pin ubuntu version in tests

Author: Kerkesni

.github/workflows/test.yml

@@ -45,7 +45,7 @@ jobs:
 
   tests:
     needs: prepare
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04-2core
     services:
       mongodb:
         image: ghcr.io/${{ github.repository }}/ci-mongodb:${{ github.sha }}