change ubuntu

.gitea/workflows/go.yaml

@@ -5,15 +5,13 @@ jobs:
   build:
     name: Build and test
     runs-on: ubuntu-latest
-    container:
-      image: golang:latest
-      env:
-        GO111MODULE: on
-        GOPROXY: https://goproxy.cn,direct
-      ports:
-        - 8080
+
     steps:
       - uses: actions/checkout@v4
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.21.x'
       - name: Build
         run: go build -v 
       - name: Test with the Go CLI