fix: add keys

.github/workflows/publish.yaml

···
       - uses: tauri-apps/tauri-action@v0
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
+          TAURI_SIGNING_PRIVATE_KEY_PASSWORD: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY_PASSWORD }}
         with:
           tagName: app-v__VERSION__ # the action automatically replaces \_\_VERSION\_\_ with the app version.
           releaseName: "App v__VERSION__"