fix ci go version

Author: leafo

.github/workflows/ci.yml

@@ -16,6 +16,6 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v6
         with:
-          go-version: '1.21'
+          go-version-file: go.mod
       - run: go version
       - run: go test -v -race ./...