Fix universal mac build

.github/workflows/build.yml

@@ -25,8 +25,8 @@ jobs:
             COMMAND: AM2RLauncher.Gtk -p:PublishSingleFile=true -p:DebugType=embedded -r ubuntu.18.04-x64 --no-self-contained
             ARTIFACT: AM2RLauncher/AM2RLauncher.Gtk/bin/Release/net6.0/ubuntu.18.04-x64/publish/
           - os: macOS-latest
-            COMMAND: AM2RLauncher.Mac -r osx-x64 --self-contained
-            ARTIFACT: AM2RLauncher/AM2RLauncher.Mac/bin/Release/net6.0/osx-x64/AM2RLauncher.Mac.app/
+            COMMAND: AM2RLauncher.Mac -r osx-x64;osx-arm64 --self-contained
+            ARTIFACT: AM2RLauncher/AM2RLauncher.Mac/bin/Release/net6.0/osx-x64osx-arm64/AM2RLauncher.Mac.app/
           - os: windows-latest
             COMMAND: AM2RLauncher.Wpf -r win-x86 -o builds\win86 
             ARTIFACT: AM2RLauncher\AM2RLauncher.Wpf\bin\Release\net48\win-x86\