ci: Use latest golangci-lint-action

This version auto-manages the cache
so we don't have to do it ourselves.

Author: abhinav

.github/workflows/go.yml

@@ -69,9 +69,8 @@ jobs:
       uses: actions/setup-go@v5
       with:
         go-version: 1.25.x
-        cache: false  # managed by golangci-lint
 
-    - uses: golangci/golangci-lint-action@v6
+    - uses: golangci/golangci-lint-action@v8
       name: Install golangci-lint
       with:
         version: latest