Update docker.io/postgres Docker tag to v18

.gitea/workflows/render-manifests-dispatch.yaml

@@ -197,8 +197,6 @@ jobs:
         run: |
           cd ${MANIFEST_DIR}
 
-          git status --porcelain --untracked-files=all | grep '^.'
-
           if git status --porcelain --untracked-files=all | grep -q '^.' ; then
             echo ">> Changes detected"
             # git status --porcelain --untracked-files=all