Update renovate.json

Author: JPrevost

renovate.json

@@ -8,13 +8,13 @@
       "matchPackageNames": [
         "ruby"
       ],
-      "allowedVersions": "<3.5"
+      "allowedVersions": "<4"
     },
     {
       "matchPackageNames": [
         "rails"
       ],
-      "allowedVersions": "<8"
+      "allowedVersions": "<8.1"
     }
   ]
 }