Pin Ubuntu to deal with older playwright failing to install

We should upgrade playwright but then I ran into some dependency issues that `npx playwright install-deps` wouldn't fix. Not willing to spend time on this now.

.github/workflows/ci.yml

@@ -5,7 +5,7 @@ on: [push, pull_request]
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
     - uses: actions/checkout@v3