Issue #28033: Fix typo in dictobject.c

Patch by Wesley Emeneker.
diff --git a/Objects/dictobject.c b/Objects/dictobject.c
index 2dcc847..461eb57 100644
--- a/Objects/dictobject.c
+++ b/Objects/dictobject.c
@@ -10,7 +10,7 @@
 
 This implements the dictionary's hashtable.
 
-As of Python 3.6, this is compact and orderd. Basic idea is described here.
+As of Python 3.6, this is compact and ordered. Basic idea is described here.
 https://morepypy.blogspot.com/2015/01/faster-more-memory-efficient-and-more.html
 
 layout: