ci: only publish electron on beta

Author: Brendonovich

.github/workflows/publish.yml

@@ -264,6 +264,7 @@ jobs:
             target: aarch64-unknown-linux-gnu
             platform_flag: --linux
     runs-on: ${{ matrix.settings.host }}
+    if: github.ref_name == 'beta'
     steps:
       - uses: actions/checkout@v3