User go 1.21

Author: metal3d

.github/workflows/go.yml

@@ -12,7 +12,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v3
       with:
-        go-version: 1.18
+        go-version: 1.21
 
     - name: Build
       run: go build -v ./...