Update wording in the comment.

Use imperative voice and orient the comment to describe the setting more directly and give guidance on what to do about it.

mypy.ini

@@ -13,6 +13,6 @@ explicit_package_bases = True
 disable_error_code =
 	# Disabled due to many false-positives
 	overload-overlap,
-	# Enable import-untyped if you'd like to be notified about using untyped dependencies or missing stubs packages
-	# You can leave it disabled if your package isn't publicly typed / `py.typed`
+	# Disable import-untyped to avoid widespread failures. Remove when safe or when
+	# specific exclusions supersede this broad setting.
 	import-untyped,