add tauri private key

Author: mono424

.github/workflows/publish.yaml

@@ -38,6 +38,7 @@ jobs:
       - uses: tauri-apps/tauri-action@v0
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          TAURI_PRIVATE_KEY: ${{ secrets.TAURI_PRIVATE_KEY }}
         with:
           tagName: app-v__VERSION__ # the action automatically replaces \_\_VERSION\_\_ with the app version
           releaseName: 'App v__VERSION__'