[CI] attempt to improve performance of postgres service

as per suggestion from saces:
https://matrix.to/#/%23coding%3Ac-base.org/%24T3HnHRzsqyUOrzQCV8y2dtOzNsPMlb-nFooEOrZuK5E?via=c-base.org&via=matrix.org&via=hackerfleet.eu

.woodpecker/workflow.yaml

@@ -23,6 +23,7 @@ steps:
 services:
   - name: database
     image: postgres:17
+    command: -c fsync=off
     environment:
       POSTGRES_PASSWORD: teilchensammler
       POSTGRES_DB: teilchensammler_test