DOC: Fix typo (#37980)

Author: MicaelJarniac

pandas/core/generic.py

@@ -11830,7 +11830,7 @@ def _doc_parms(cls):
 _any_desc = """\
 Return whether any element is True, potentially over an axis.
 
-Returns False unless there at least one element within a series or
+Returns False unless there is at least one element within a series or
 along a Dataframe axis that is True or equivalent (e.g. non-zero or
 non-empty)."""