ci: upgrade golangci-lint-action to v9 to support Go 1.25

Author: Ubuntu

.github/workflows/ci.yml

@@ -45,9 +45,9 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v6
         with:
-          go-version: '>=1.25'
+          go-version: '1.25'
 
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v6
+        uses: golangci/golangci-lint-action@v9
         with:
           version: latest