DOC: Fixed type hints for GroupBy.{any, all} (#36284)

Author: ytakashina

pandas/core/groupby/groupby.py

@@ -1371,7 +1371,9 @@ def any(self, skipna: bool = True):
 
         Returns
         -------
-        bool
+        Series or DataFrame
+            DataFrame or Series of boolean values, where a value is True if any element
+            is True within its respective group, False otherwise.
         """
         return self._bool_agg("any", skipna)
 
@@ -1388,7 +1390,9 @@ def all(self, skipna: bool = True):
 
         Returns
         -------
-        bool
+        Series or DataFrame
+            DataFrame or Series of boolean values, where a value is True if all elements
+            are True within its respective group, False otherwise.
         """
         return self._bool_agg("all", skipna)