chore(ci): add apple signing

.github/workflows/build-desktop-release.yml

@@ -156,6 +156,11 @@ jobs:
         with:
           node-version: 14
 
+      - uses: apple-actions/import-codesign-certs@v1
+        with:
+          p12-file-base64: ${{ secrets.APPLE_CERTIFICATES_P12 }}
+          p12-password: ${{ secrets.APPLE_CERTIFICATES_P12_PASSWORD }}
+
       - name: Build/Release Electron App
         run: yarn && yarn electron:make
         working-directory: ./static