Add 60 minute timeout to performance job (#61957)

The performance job on CI sometimes hangs and runs indefinitely. Add a timeout.

Co-authored-by: sirreal <jonsurrell@git.wordpress.org>
Co-authored-by: alexstine <alexstine@git.wordpress.org>

.github/workflows/performance.yml

@@ -25,6 +25,7 @@ concurrency:
 
 jobs:
     performance:
+        timeout-minutes: 60
         name: Run performance tests
         runs-on: ubuntu-latest
         if: ${{ github.repository == 'WordPress/gutenberg' }}