Fix macOS CI: use verified two-part APPLE_DEVID_P12 secret

Author: proggeramlug

.github/workflows/release.yml

@@ -42,7 +42,7 @@ jobs:
         run: |
           echo "${{ secrets.APPLE_APPSTORE_P12 }}" | base64 -d > /tmp/macos_appstore.p12
           echo "${{ secrets.APPLE_INSTALLER_P12 }}" | base64 -d > /tmp/macos_installer.p12
-          echo "${{ secrets.APPLE_DEVID_P12 }}" | base64 -d > /tmp/macos_devid.p12
+          echo "${{ secrets.APPLE_DEVID_P12_PART1 }}${{ secrets.APPLE_DEVID_P12_PART2 }}" | base64 -d > /tmp/macos_devid.p12
           echo "${{ secrets.APPLE_P8_KEY }}" | base64 -d > /tmp/appstore_connect.p8
 
       - name: Inject credential paths into perry.toml