ci(lint): bump golangci-lint to v2.12

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: appleboy

.github/workflows/lint.yml

@@ -28,5 +28,5 @@ jobs:
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v9
         with:
-          version: v2.9
+          version: v2.12
           args: --verbose