Fix typo in the What's New for 3.10 (GH-25396)

Author: pablogsal

Doc/whatsnew/3.10.rst

@@ -175,7 +175,7 @@ AttributeErrors
 ~~~~~~~~~~~~~~~
 
 When printing :exc:`AttributeError`, :c:func:`PyErr_Display` will offer
-suggestions of simmilar attribute names in the object that the exception was
+suggestions of similar attribute names in the object that the exception was
 raised from:
 
 .. code-block:: python

Misc/NEWS.d/next/Core and Builtins/2019-10-27-20-20-07.bpo-38530.ZyoDNn.rst

@@ -1,3 +1,3 @@
 When printing :exc:`AttributeError`, :c:func:`PyErr_Display` will offer
-suggestions of simmilar attribute names in the object that the exception was
+suggestions of similar attribute names in the object that the exception was
 raised from. Patch by Pablo Galindo