fix: deprecate yarnrc

lib/config/validation.ts

@@ -49,6 +49,8 @@ export async function validateConfig(
       branchName: `Direct editing of branchName is now deprecated. Please edit branchPrefix, additionalBranchPrefix, or branchTopic instead`,
       commitMessage: `Direct editing of commitMessage is now deprecated. Please edit commitMessage's subcomponents instead.`,
       prTitle: `Direct editing of prTitle is now deprecated. Please edit commitMessage subcomponents instead as they will be passed through to prTitle.`,
+      yarnrc:
+        'Use of `yarnrc` in config is deprecated. Please commit it to your repository instead.',
     };
     return deprecatedOptions[option];
   }