disable cargo updates on release branches

Author: nzbr

.github/renovate.json5

@@ -28,6 +28,12 @@
       matchUpdateTypes: ["major", "minor", "patch"],
       enabled: false,
     },
+    {
+      // Disable cargo update PRs on release branches
+      matchBaseBranches: ["/^release-.+$/"],
+      matchManagers: ["cargo"],
+      enabled: false,
+    },
     {
       // Automerge minor and patch updates for _official_ Actions
       matchManagers: ["github-actions"],