[Enum] fix typos (GH-96285)

(cherry picked from commit 5888264)

Co-authored-by: wim glenn <[email protected]>

Lib/enum.py

@@ -22,14 +22,14 @@
 
 class nonmember(object):
     """
-    Protects item from becaming an Enum member during class creation.
+    Protects item from becoming an Enum member during class creation.
     """
     def __init__(self, value):
         self.value = value
 
 class member(object):
     """
-    Forces item to became an Enum member during class creation.
+    Forces item to become an Enum member during class creation.
     """
     def __init__(self, value):
         self.value = value