Fixed typo in W0212 (#9892)

Author: bshoshany

doc/user_guide/checkers/features.rst

@@ -328,7 +328,7 @@ Classes checker Messages
   interface or in an overridden method.
 :protected-access (W0212): *Access to a protected member %s of a client class*
   Used when a protected member (i.e. class member with a name beginning with an
-  underscore) is access outside the class or a descendant of the class where
+  underscore) is accessed outside the class or a descendant of the class where
   it's defined.
 :attribute-defined-outside-init (W0201): *Attribute %r defined outside __init__*
   Used when an instance attribute is defined outside the __init__ method.

pylint/checkers/classes/class_checker.py

@@ -523,7 +523,7 @@ def _has_same_layout_slots(
         "Access to a protected member %s of a client class",  # E0214
         "protected-access",
         "Used when a protected member (i.e. class member with a name "
-        "beginning with an underscore) is access outside the class or a "
+        "beginning with an underscore) is accessed outside the class or a "
         "descendant of the class where it's defined.",
     ),
     "W0213": (