Update MacOS GitHub workflow to use macos-latest

.github/workflows/build.yml

@@ -16,13 +16,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-13, windows-latest]
+        os: [ubuntu-latest, macos-latest, windows-latest]
         configuration: [Release]
         include:
           - os: ubuntu-latest
             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-13
+            ARTIFACT: AM2RLauncher/AM2RLauncher.Gtk/bin/Release/net8.0/ubuntu.18.04-x64/publish/
+          - os: macos-latest
             COMMAND: AM2RLauncher.Mac -o builds/macOS-latest
             ARTIFACT: AM2RLauncher/builds/macOS-latest
           - os: windows-latest
@@ -40,9 +40,6 @@ jobs:
     - name: Install Mac workload 
       working-directory: ./AM2RLauncher
       run: dotnet workload install macos && dotnet workload restore
-    - name: Switch XCode
-      run: sudo xcode-select -switch /Applications/Xcode_15.0.1.app/Contents/Developer
-      if: matrix.os == 'macos-13'
     - name: Restore dependencies
       working-directory: ./AM2RLauncher
       run: dotnet restore