Use develop/6.x branch for junit-examples during release build

Author: marcphilipp

.github/workflows/release.yml

@@ -84,6 +84,7 @@ jobs:
           token: ${{ secrets.JUNIT_BUILDS_GITHUB_TOKEN_EXAMPLES_REPO }}
           fetch-depth: 1
           path: junit-examples
+          ref: develop/6.x
       - name: Set up JDK
         uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.7.1
         with:
@@ -242,6 +243,7 @@ jobs:
           repository: ${{ github.repository_owner }}/junit-examples
           token: ${{ secrets.JUNIT_BUILDS_GITHUB_TOKEN_EXAMPLES_REPO }}
           fetch-depth: 1
+          ref: develop/6.x
       - name: Set up JDK
         uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.7.1
         with: