PEP 618: Fix typo (#1848)

Author: jacobtylerwalls

pep-0618.rst

@@ -164,7 +164,7 @@ Add ``itertools.zip_strict``
 ----------------------------
 
 This is the alternative with the most support on the Python-Ideas
-mailing list, so it deserves do be discussed in some detail here.  It
+mailing list, so it deserves to be discussed in some detail here.  It
 does not have any disqualifying flaws, and could work well enough as a
 substitute if this PEP is rejected.