DOC: Fix Pandas.series.str.fullmatch RT03 (#59395)

* DOC: fix andas.Series.str.fullmatch RT03

* DOC: remove pandas.Series.str.fullmatch RT03 from code_checks.sh

Author: KatsiarynaDzibrova

ci/code_checks.sh

@@ -164,7 +164,6 @@ 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.fullmatch RT03" \
         -i "pandas.Series.str.index RT03" \
         -i "pandas.Series.str.ljust RT03,SA01" \
         -i "pandas.Series.str.lower RT03" \

pandas/core/strings/accessor.py

@@ -1418,6 +1418,9 @@ def fullmatch(self, pat, case: bool = True, flags: int = 0, na=None):
         Returns
         -------
         Series/Index/array of boolean values
+            The function returns a Series, Index, or array of boolean values,
+            where True indicates that the entire string matches the regular
+            expression pattern and False indicates that it does not.
 
         See Also
         --------