Pin github action Postgres version to 16 for now

mbanck-cd · mbanck-cd · commit 92e35ef1ada2 · 2025-07-07T09:42:15.000+02:00
diff --git a/.github/workflows/omdb.yaml b/.github/workflows/omdb.yaml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     services:
       postgres:
-        image: postgres
+        image: postgres:16
         ports:
           - 5432:5432
         env:
