fix(ci): upgrade golangci-lint action to v6 and pin to v2.6.1 to match local config

Author: yeasy

.github/workflows/lint.yml

@@ -22,9 +22,9 @@ jobs:
           cache: false
 
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v4
+        uses: golangci/golangci-lint-action@v6
         with:
-          version: latest
+          version: v2.6.1
           args: --timeout=5m
 
   format: