fixed workflow

.gitea/workflows/build.yaml

@@ -13,6 +13,10 @@ jobs:
         uses: actions/checkout@v4
       - run: echo "${{ gitea.repository }} repository has been cloned to the runner."
       - run: echo "The workflow is now ready to test your code on the runner."
+      - name: Setup Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: '1.24.4'
       - name: Build the server app
         run: go build bang.go
       - name: List files