Updating urls to https where possible (#573)

Author: stevenmccullaghmadetech

specification/summary-care-record.yaml

@@ -9,7 +9,7 @@ info:
             <div class="nhsd-m-emphasis-box__image-box">
                 <figure class="nhsd-a-image">
                     <picture class="nhsd-a-image__picture">
-                        <img src="http://digital.nhs.uk/binaries/content/gallery/icons/info.svg?colour=231f20" alt="" style="object-fit:fill">
+                        <img src="https://digital.nhs.uk/binaries/content/gallery/icons/info.svg?colour=231f20" alt="" style="object-fit:fill">
                     </picture>
                 </figure>
             </div>
@@ -67,7 +67,7 @@ info:
     ## Technology
     This API is [RESTful](https://digital.nhs.uk/developer/guides-and-documentation/our-api-technologies#basic-rest).
 
-    It conforms to the [FHIR](https://digital.nhs.uk/developer/guides-and-documentation/our-api-technologies#fhir) global standard for health care data exchange, specifically to [FHIR R4 (v4.0.1)](https://hl7.org/fhir/r4/), except that it does not support the [capabilities](http://hl7.org/fhir/R4/http.html#capabilities) interaction.
+    It conforms to the [FHIR](https://digital.nhs.uk/developer/guides-and-documentation/our-api-technologies#fhir) global standard for health care data exchange, specifically to [FHIR R4 (v4.0.1)](https://hl7.org/fhir/r4/), except that it does not support the [capabilities](https://hl7.org/fhir/R4/http.html#capabilities) interaction.
 
     It includes some country-specific FHIR extensions, which are built against [FHIR UK Core](https://digital.nhs.uk/services/fhir-uk-core), specifically [UK.core.r4.v2 2.0.5](https://simplifier.net/packages/uk.core.r4.v2/2.0.5).
 
@@ -157,12 +157,12 @@ info:
             <div class="nhsd-m-emphasis-box__image-box">
                 <figure class="nhsd-a-image">
                     <picture class="nhsd-a-image__picture">
-                        <img src="http://digital.nhs.uk/binaries/content/gallery/icons/play-circle.svg?colour=231f20" alt="" style="object-fit:fill">
+                        <img src="https://digital.nhs.uk/binaries/content/gallery/icons/play-circle.svg?colour=231f20" alt="" style="object-fit:fill">
                     </picture>
                 </figure>
             </div>
             <div class="nhsd-m-emphasis-box__content-box">
-                <div data-uipath="website.contentblock.emphasis.content" class="nhsd-t-word-break"><p class="nhsd-t-body">To get started, sign in or create a <a href="http://onboarding.prod.api.platform.nhs.uk/">developer account</a>, then select 'product onboarding'.</p></div>            
+                <div data-uipath="website.contentblock.emphasis.content" class="nhsd-t-word-break"><p class="nhsd-t-body">To get started, sign in or create a <a href="https://onboarding.prod.api.platform.nhs.uk/">developer account</a>, then select 'product onboarding'.</p></div>            
             </div>
         </div>
     </div>