chore: bump rc job timeout-minutes from 10 to 30 (#1834)

npm run test:coverage:unit across 861 test files with coverage
instrumentation runs ~12–15 minutes — the 10-minute ceiling
consistently kills the rc dry-run before tests complete.

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/workflows/release.yml

@@ -319,7 +319,7 @@ jobs:
     needs: [validate-version, install-smoke-rc]
     if: inputs.action == 'rc'
     runs-on: ubuntu-latest
-    timeout-minutes: 10
+    timeout-minutes: 30
     permissions:
       contents: write
       id-token: write