ghactions: macos: Fix installer filename

The macos installer is now created as
out/macos-universal/crc-macos-installer.pkg
The artifact upload action was not updated for the new name

Author: cfergeau

.github/workflows/macos-installer.yml

@@ -51,4 +51,4 @@ jobs:
         uses: actions/upload-artifact@v2
         with:
           name: macOS Installer (${{ matrix.os }})
-          path: "./out/macos-amd64/crc-macos-amd64.pkg"
+          path: "./out/macos-universal/crc-macos-installer.pkg"