gitea-packages-update-check: ciを追加

.gitea/workflows/gitea-packages-update-check-build.yaml

@@ -21,6 +21,9 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
+      - uses: actions/setup-go@v4
+        with:
+          go-version: "^1.20"
       - run: go build -o gitea-packages-update-check -ldflags="-s -w" -trimpath
       - run: curl --user usbharu:${{ secrets.DEPLOY_TOKEN }} --upload-file gitea-packages-update-check https://git.usbharu.dev/api/packages/usbharu/generic/gitea-packages-update-check/${{ github.sha }}/gitea-packages-update-check
         if: github.event.pull_request.merged == true