Pin golangci-lint version and explicitly specify config file

- Pin to v1.64.8 (latest stable version)
- Explicitly pass --config=.golangci.yml to ensure the action uses our config
- This should fix the lint failures in GitHub Actions

Author: leifj

.github/workflows/ci.yml

@@ -72,8 +72,8 @@ jobs:
     - name: golangci-lint
       uses: golangci/golangci-lint-action@v4
       with:
-        version: latest
-        args: --timeout=5m
+        version: v1.64.8
+        args: --timeout=5m --config=.golangci.yml
 
   format:
     name: Format Check