Update docker.io/library/postgres Docker tag to v18

renovate.json

@@ -11,11 +11,7 @@
     ":ignoreUnstable",
     ":disableRateLimiting",
     ":rebaseStalePrs",
-    ":label(renovate)",
+    ":label(renovate)"
-
-    // a lot of packages do not support skipping major versions
-    // with this option renovate creates a pr from the current version to each newer version
-    ":separateMultipleMajorReleases"
   ],
   "semanticCommits": "disabled",
   "ignorePaths": [