Update docker.io/postgres Docker tag to v18

.gitea/workflows/render-manifests.yaml

@@ -89,13 +89,13 @@ jobs:
             fi
           fi
 
-          RENDER_DIR=(printf "%s\n" "$RENDER_DIR" | sort -u)
           echo ">> Directories to Render:"
-          echo "$RENDER_DIR"
+          echo "$(printf "%s\n" "$RENDER_DIR" | sort -u)"
+
           echo "-----"
 
           echo "changes-detected=true" >> $GITEA_OUTPUT
-          echo "render-dir=$RENDER_DIR" >> $GITEA_OUTPUT
+          echo "render-dir=$(printf "%s\n" "$RENDER_DIR" | sort -u)" >> $GITEA_OUTPUT
 
       - name: Add Repositories
         if: steps.check-dir-changes.outputs.changes-detected == 'true'