Build/Test Tools: Add some further missing permissions to the GitHub Actions workflows.

These permissions are not required for a public repo but are required for a private repo, for example a private fork.

Props johnbillion, desrosj

Follow-up to r60612.

See #63170

git-svn-id: https://develop.svn.wordpress.org/trunk@60624 602fd350-edb4-49c9-b593-d223f7449a82

Author: johnbillion

.github/workflows/check-built-files.yml

@@ -44,3 +44,5 @@ jobs:
     # This prevents an unnecessary second run after changes are committed back because Dependabot always rebases and force pushes.
     if: ${{ github.repository == 'wordpress/wordpress-develop' && ( github.actor != 'dependabot[bot]' || github.event.commits < 2 ) }}
     uses: WordPress/wordpress-develop/.github/workflows/reusable-check-built-files.yml@trunk
+    permissions:
+      contents: read

.github/workflows/upgrade-develop-testing.yml

@@ -56,6 +56,8 @@ jobs:
     uses: WordPress/wordpress-develop/.github/workflows/reusable-upgrade-testing.yml@trunk
     if: ${{ github.repository == 'WordPress/wordpress-develop' || ( github.event_name == 'pull_request' && github.actor != 'dependabot[bot]' ) }}
     needs: [ build ]
+    permissions:
+      contents: read
     strategy:
       fail-fast: false
       matrix: