Fix typo on Exporting to macOS (#5878)

Co-authored-by: Hugo Locurcio <[email protected]>

tutorials/export/exporting_for_macos.rst

@@ -25,9 +25,9 @@ Requirements
 Code signing and notarization
 -----------------------------
 
-By default, macOS will run only applications that are signed and notarized, if you use any other signing configuration see :ref:`Running Godot apps on macOS <doc_running_on_macos>` for workarounds.
+By default, macOS will run only applications that are signed and notarized. If you use any other signing configuration, see :ref:`Running Godot apps on macOS <doc_running_on_macos>` for workarounds.
 
-To notarize an app you mast have a valid `Apple Developer ID Certificate <https://developer.apple.com/>`__.
+To notarize an app, you **must** have a valid `Apple Developer ID Certificate <https://developer.apple.com/>`__.
 
 If you have an Apple Developer ID Certificate
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~