DOC: update the pandas.DataFrame.apply docstring

Author: mdeboc

pandas/core/frame.py

@@ -4892,7 +4892,7 @@ def apply(self, func, axis=0, broadcast=None, raw=False, reduce=None,
         args : tuple
             Positional arguments to pass to function in addition to the
             array/series.
-        kwds :
+        **kwds
             Additional keyword arguments to pass as keywords to the function.
 
         Notes