Increase nofile limit to 10,000 when building container on PR workflow too

.github/workflows/pull_requests.yml

@@ -46,6 +46,9 @@ jobs:
         containerfiles: ./Containerfile
         platforms: linux/amd64
         oci: true
+        # Webpack seems to use a lot of open files, increase the max open file limit to accomodate.
+        extra-args: |
+          --ulimit nofile=10000
 
     - name: UI Tests
       if: success()