Add missing go version

Author: 5nord

.github/workflows/ci.yaml

@@ -39,6 +39,8 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
+        with:
+          go-version: latest
       - run: mkdir -p "$PWD/servers"; GOBIN="$PWD/servers" go install github.com/nokia/ntt@latest
       - uses: actions/setup-node@v4
         with: