update github action

Author: keeee2

.github/workflows/go.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version: 'go.mod'
+          go-version: '1.21'
 
       - name: Build app (app/main.go)
         run: |