Issue #15825: fix typo in OrderedDict docs.

Patch by Mike Hoy.

Doc/ACKS.txt

@@ -95,6 +95,7 @@ docs@python.org), and we'll be glad to correct the problem.
    * Rob Hooft
    * Brian Hooper
    * Randall Hopper
+   * Mike Hoy
    * Michael Hudson
    * Eric Huss
    * Jeremy Hylton

Doc/library/collections.rst

@@ -878,7 +878,7 @@ are deleted.  But when new keys are added, the keys are appended
 to the end and the sort is not maintained.
 
 It is also straight-forward to create an ordered dictionary variant
-that the remembers the order the keys were *last* inserted.
+that remembers the order the keys were *last* inserted.
 If a new entry overwrites an existing entry, the
 original insertion position is changed and moved to the end::