.ruby-version is pinned to major only ("4") and Renovate
bumps it to patch versions we do not want.

Assisted-by: Claude Opus 4.6 via pi

diff --git a/renovate.json b/renovate.json
index 722ab46..53a035b 100644
--- a/renovate.json
+++ b/renovate.json
@@ -3,7 +3,7 @@
   "extends": ["config:recommended"],
   "packageRules": [
     {
-      "matchManagers": ["bundler", "dockerfile", "github-actions", "ruby-version"],
+      "matchManagers": ["bundler", "dockerfile", "github-actions"],
       "schedule": ["every weekend"]
     }
   ],