chore(deps): update actions/checkout action to v7

.github/workflows/build.yaml

@@ -28,7 +28,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v7
 
     - name: Fetch secrets from Infisical
       uses: Infisical/secrets-action@v1.0.16

.github/workflows/secret-scan.yml

@@ -11,7 +11,7 @@ jobs:
       contents: read
       pull-requests: read  # gitleaks-action lists PR commits via the API
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0  # full history for PR diff scans
       - uses: gitleaks/gitleaks-action@v2.3.9  # pin the tag

.github/workflows/validate.yaml

@@ -4,5 +4,5 @@ jobs:
   manifests:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v7
       - uses: dvystrcil/kustomize-validate-action@v1