fix(ci): upgrade golangci-lint-action to v4 for v2 compatibility

v3 action uses --out-format flag which v2.1.6 doesn't support.
Upgrade to v4 action which should properly support golangci-lint v2.
This should resolve the 'unknown flag: --out-format' error.

.github/workflows/ci.yml

@@ -79,7 +79,7 @@ jobs:
           go-version: '1.24'
 
       - name: Run golangci-lint
-        uses: golangci/golangci-lint-action@v3
+        uses: golangci/golangci-lint-action@v4
         with:
           version: v2.1.6
           args: --timeout=5m