setup go before running go generate

.gitea/workflows/gen_code.yml

@@ -14,6 +14,11 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v3
+      
+      - name: Setup Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: 1.25
 
       - name: Save pre-generate git state
         run: git status --porcelain > pre-generate.txt