DOC: Fix pandas.Series.str.index RT03 (#59397)

* DOC: fix pandas.Series.str.index RT03

* DOC: Remove pandas.Series.str.index RT03 from ci checks

* remove pandas.Series.str.rindex RT03 from ci check

Author: KatsiarynaDzibrova

ci/code_checks.sh

@@ -163,7 +163,6 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         -i "pandas.Series.str.center RT03,SA01" \
         -i "pandas.Series.str.decode PR07,RT03,SA01" \
         -i "pandas.Series.str.encode PR07,RT03,SA01" \
-        -i "pandas.Series.str.index RT03" \
         -i "pandas.Series.str.ljust RT03,SA01" \
         -i "pandas.Series.str.lower RT03" \
         -i "pandas.Series.str.lstrip RT03" \
@@ -172,7 +171,6 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         -i "pandas.Series.str.partition RT03" \
         -i "pandas.Series.str.repeat SA01" \
         -i "pandas.Series.str.replace SA01" \
-        -i "pandas.Series.str.rindex RT03" \
         -i "pandas.Series.str.rjust RT03,SA01" \
         -i "pandas.Series.str.rpartition RT03" \
         -i "pandas.Series.str.rstrip RT03" \

pandas/core/strings/accessor.py

@@ -3092,6 +3092,8 @@ def normalize(self, form):
     Returns
     -------
     Series or Index of object
+        Returns a Series or an Index of the %(side)s indexes
+        in each string of the input.
 
     See Also
     --------