ci: use golangci-lint v2 in ci

Author: nnnkkk7

.github/workflows/pull-request.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Format check
         run: make fmt-check
       - name: Install golangci-lint
-        run: go install github.com/golangci/golangci-lint/cmd/golangci-lint@${{ env.GOLANGCI_LINT }}
+        run: go install github.com/golangci/golangci-lint/v2/cmd/golangci-lint@${{ env.GOLANGCI_LINT }}
       - name: Lint
         run: make lint
   unit-test: