Rename internal strings accessor module to match runtime (pandas-dev#1295)

Author: hamdanal

pandas-stubs/core/indexes/base.pyi

@@ -34,7 +34,7 @@ from pandas import (
 )
 from pandas.core.arrays import ExtensionArray
 from pandas.core.base import IndexOpsMixin
-from pandas.core.strings import StringMethods
+from pandas.core.strings.accessor import StringMethods
 from typing_extensions import (
     Never,
     Self,

pandas-stubs/core/series.pyi

@@ -77,7 +77,7 @@ from pandas.core.indexing import (
     _IndexSliceTuple,
     _LocIndexer,
 )
-from pandas.core.strings import StringMethods
+from pandas.core.strings.accessor import StringMethods
 from pandas.core.window import (
     Expanding,
     ExponentialMovingWindow,