Fixed a small typo

tutorials/editor/project_settings.rst

@@ -120,7 +120,7 @@ Manually editing project.godot
 You can open the ``project.godot`` file using a text editor and manually
 change project settings. Note that if the ``project.godot`` file does not have a
 stored value for a particular setting, it is implicitly the default value of
-that setting. This means that if you are are manually editing the file, you may
+that setting. This means that if you are manually editing the file, you may
 have to write in both the setting name *and* the value.
 
 In general, it is recommended to use the Project Settings window rather than