Remove redundant branch protection lock on support branch creation (#218)

Support branches created during release are explicitly locked via the
`branch-protection/lock` action, but this is unnecessary — the repo
already has a `support/**` glob pattern branch protection rule that
applies automatically to any newly pushed branch matching that pattern.

## Changes

- **`release.yml`**: Removed the `Lock support branch` step from the
`create-support-branch` job
- **`release.yml`**: Updated the step summary message from "Created and
locked" to "Created"

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: petesramek <2333452+petesramek@users.noreply.github.com>

Author: Copilot

.github/workflows/release.yml

@@ -371,17 +371,10 @@ jobs:
           git checkout -b "${{ steps.resolve-support-branch.outputs.support-branch }}"
           git push --set-upstream origin "${{ steps.resolve-support-branch.outputs.support-branch }}"
 
-      - name: 'Lock support branch'
-        if: ${{ steps.check-support-branch.outputs.support-branch-exists == 'false' }}
-        uses: './.github/actions/github/branch-protection/lock'
-        with:
-          branch: ${{ steps.resolve-support-branch.outputs.support-branch }}
-          token: ${{ secrets.GH_ADMIN_TOKEN }}
-
       - name: 'Write support branch summary'
         run: |
           if [[ "${{ steps.check-support-branch.outputs.support-branch-exists }}" == "false" ]]; then
-            echo "✅ Created and locked support branch **${{ steps.resolve-support-branch.outputs.support-branch }}**." >> $GITHUB_STEP_SUMMARY
+            echo "✅ Created support branch **${{ steps.resolve-support-branch.outputs.support-branch }}**." >> $GITHUB_STEP_SUMMARY
           else
             echo "⏭️ Support branch **${{ steps.resolve-support-branch.outputs.support-branch }}** already exists." >> $GITHUB_STEP_SUMMARY
           fi