chore(ci): update renovate config

Author: boneskull

.github/renovate.json5

@@ -10,8 +10,5 @@
     ':automergeMinor',
   ],
   labels: ['dependencies'],
-  lockFileMaintenance: {
-    enabled: true,
-    automerge: true,
-  },
+  postUpdateOptions: ['gomodTidy', 'gomodUpdateImportPaths'],
 }