ci(release-rc): pass secrets to the shared workflow so it can sign the RC tag

QRun-IO/.github#2 adds a tag-and-release job that signs vX with the
QRUN_TAG_SIGNING_KEY secret after Maven Central confirms the artifact.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.github/workflows/release-rc.yml

@@ -21,5 +21,6 @@ jobs:
   release-rc:
     if: github.event_name == 'workflow_dispatch' || (github.event.pull_request.merged == true && contains(github.event.pull_request.labels.*.name, 'release:rc'))
     uses: QRun-IO/.github/.github/workflows/qbit-release-rc.yml@main
+    secrets: inherit
     with:
       dry_run: ${{ github.event_name == 'workflow_dispatch' && inputs.dry_run }}