gh-action: latest go linter, static checker

Author: ignoramous

.github/workflows/go.yml

@@ -323,11 +323,11 @@ jobs:
           go run github.com/tailscale/depaware github.com/celzero/firestack/intra
           go run github.com/tailscale/depaware github.com/celzero/firestack/tunnel
       - name: 🏅 Lint
-        uses: golangci/golangci-lint-action@v3.7.0
+        uses: golangci/golangci-lint-action@v8.0.0
         with:
           args: --config=.golangci.yml --issues-exit-code=0
       - name: 📡 Staticheck
-        uses: dominikh/staticcheck-action@v1.3.1
+        uses: dominikh/staticcheck-action@v1.4.0
         with:
           version: "latest"
           install-go: false