Downgrading unit-tests for ubuntu to ubuntu-22.04 until puppeteer/puppeteer#12818 is fixed.

Author: MarkusBordihn

.github/workflows/unit_tests.yml

@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        os: [windows-latest, macos-latest, ubuntu-latest]
+        os: [windows-latest, macos-latest, ubuntu-22.04]
 
     steps:
       - name: Check out Git repository