Fix heading levels

Author: dshevtsov

src/_includes/backward-incompatible-changes/commerce/2.4.0-2.4.1.md

@@ -11,7 +11,7 @@
 | Magento\ReCaptchaValidationApi\Model\ValidationErrorMessagesProvider | Class was added.                     |
 | Magento\User\Model\User::$\_cacheTag                                 | [protected] Property has been added. |
 
-#### Interface changes {#ee-240-241-interface}
+### Interface changes {#ee-240-241-interface}
 
 | What changed                                                                     | How it changed                    |
 | -------------------------------------------------------------------------------- | --------------------------------- |

src/_includes/backward-incompatible-changes/commerce/2.4.1-2.4.2.md

@@ -18,7 +18,7 @@
 | Magento\Sales\Block\Order\Recent::\_\_construct                                                      | [public] Method parameter typing changed. |
 | Magento\Wishlist\Block\AddToWishlist::\_toHtml                                                       | [protected] Method has been removed.      |
 
-#### Interface changes {#ee-241-242-interface}
+### Interface changes {#ee-241-242-interface}
 
 | What changed                                                               | How it changed                         |
 | -------------------------------------------------------------------------- | -------------------------------------- |

src/_includes/backward-incompatible-changes/commerce/2.4.2-2.4.3.md

@@ -11,7 +11,7 @@
 | Magento\Paypal\Block\PayLater\Banner                                            | Class was added.                        |
 | Magento\ReCaptchaWebapiApi\Model\CompositeWebapiValidationConfigProvider        | Class was added.                        |
 
-#### Interface changes {#ee-242-243-interface}
+### Interface changes {#ee-242-243-interface}
 
 | What changed                                                           | How it changed                         |
 | ---------------------------------------------------------------------- | -------------------------------------- |

src/_includes/backward-incompatible-changes/commerce/2.4.5-2.4.6.md

@@ -78,7 +78,7 @@
 | Magento\User\Model\ResourceModel\User::getValidationRulesBeforeSave | [public] Method return typing changed. |
 | Magento\User\Model\User::\_getValidationRulesBeforeSave | [protected] Method return typing changed. |
 
-#### Interface changes {#b2b-245-246-interface}
+### Interface changes {#b2b-245-246-interface}
 
 | What changed | How it changed |
 | --- | --- |

src/_includes/backward-incompatible-changes/commerce/2.4.6-2.4.7.md

@@ -182,7 +182,7 @@
 | Magento\Weee\Helper\Data | Interface has been added. |
 | Magento\Weee\Helper\Data::\_resetState | [public] Method has been added. |
 
-#### Interface changes {#b2b-246-247-interface}
+### Interface changes {#b2b-246-247-interface}
 
 | What changed | How it changed |
 | --- | --- |
@@ -279,7 +279,7 @@
 | elasticsearch5FieldTypeFloatResolver | Virtual Type was removed |
 | elasticsearch5StaticFieldProvider | Virtual Type was removed |
 
-#### Layout changes {#b2b-246-247-layout}
+### Layout changes {#b2b-246-247-layout}
 
 | What changed | How it changed |
 | --- | --- |

src/_includes/backward-incompatible-changes/commerce/2.4.7-2.4.8.md

@@ -647,7 +647,7 @@
 - Magento\Catalog\Model\AbstractModel::getAttributeDefaultValue
 - Magento\Framework\Data\Collection::getItemById
 
-#### Interface changes
+### Interface changes
 
 #### Added parent to interface
 
@@ -953,7 +953,7 @@
 - productGridColumnRegistration
 - productMassActionRegistration
 
-#### Layout changes
+### Layout changes
 
 #### Block was removed
 

src/_includes/backward-incompatible-changes/open-source/2.3.0-2.4.0.md

@@ -658,7 +658,7 @@
 | Magento\Backend\Block\Dashboard\Totals | Class was added. |
 | Magento\Backend\Block\Dashboard\Orders\Grid | Class was added. |
 
-#### Interface API membership changes {#ce-230-240-interface-api-membership}
+### Interface API membership changes {#ce-230-240-interface-api-membership}
 
 | What changed | How it changed |
 | --- | --- |

src/_includes/backward-incompatible-changes/open-source/2.4.0-2.4.1.md

@@ -10,7 +10,7 @@
 | Magento\Framework\Stdlib\Cookie\CookieMetadata::setSameSite   | [public] Method has been added.      |
 | Magento\User\Model\User::$\_cacheTag                          | [protected] Property has been added. |
 
-#### Interface changes {#ce-240-241-interface}
+### Interface changes {#ce-240-241-interface}
 
 | What changed                                              | How it changed       |
 | --------------------------------------------------------- | -------------------- |

src/_includes/backward-incompatible-changes/open-source/2.4.2-2.4.3.md

@@ -11,7 +11,7 @@
 | Magento\Paypal\Block\PayLater\Banner                                            | Class was added.                        |
 | Magento\ReCaptchaWebapiApi\Model\CompositeWebapiValidationConfigProvider        | Class was added.                        |
 
-#### Interface changes {#ce-242-243-interface}
+### Interface changes {#ce-242-243-interface}
 
 | What changed                                                           | How it changed                         |
 | ---------------------------------------------------------------------- | -------------------------------------- |

src/_includes/backward-incompatible-changes/open-source/2.4.5-2.4.6.md

@@ -68,7 +68,7 @@
 | Magento\User\Model\ResourceModel\User::getValidationRulesBeforeSave | [public] Method return typing changed. |
 | Magento\User\Model\User::\_getValidationRulesBeforeSave | [protected] Method return typing changed. |
 
-#### Interface changes {#ce-245-246-interface}
+### Interface changes {#ce-245-246-interface}
 
 | What changed | How it changed |
 | --- | --- |