Pass updater signing key to release build

Author: tri5m

.github/workflows/release.yml

@@ -109,6 +109,7 @@ jobs:
 
       - name: Build
         env:
+          TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
           TAURI_SIGNING_PRIVATE_KEY_PATH: ${{ runner.temp }}/tauri-signing.key
           TAURI_SIGNING_PRIVATE_KEY_PASSWORD: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY_PASSWORD }}
         run: npm run build -- ${{ matrix.build_args }}