fix: use installed go

Author: santhoshmprabhu

.github/workflows/golangci.yaml

@@ -28,6 +28,8 @@ jobs:
         fetch-depth: 0
     - name: Generate BPF code
       run: go generate ./bpf-prog/block-iptables/...
+      env:
+        GOTOOLCHAIN: local
     - name: golangci-lint
       uses: golangci/golangci-lint-action@v6
       with: