Rename pull-request-build-yml to pull-request-build.yml

The original filename was `-yml` which I believe was preventing the workflow from running.

Author: cghirardi

.github/workflows/pull-request-build-yml renamed to .github/workflows/pull-request-build.yml

@@ -42,4 +42,4 @@ jobs:
             --branch "${{ github.event.pull_request.head.ref }}" \
             --pr-number "${{ github.event.pull_request.number }}" \
             --run-id "${{ github.run_id }}"
-        timeout-minutes: 510 # 8.5 hours
+        timeout-minutes: 510 # 8.5 hours