Fix create-dmg argument order

Author: electricbrass

.github/workflows/macos.yml

@@ -31,7 +31,7 @@ jobs:
     - name: Create DMG
       run: |
         brew install create-dmg
-        create-dmg ./build/Release/ ./build/Release/odamex.dmg --background ./media/macinstaller-background.png
+        create-dmg ./build/Release/odamex.dmg ./build/Release/ --background ./media/macinstaller-background.png
     - name: Upload DMG
       uses: actions/upload-artifact@v4
       with: