Fix typo in 3.7 What's New (GH-3069)

Remove unneeded word `to`.

Author: dhimmel

Doc/whatsnew/3.7.rst

@@ -247,7 +247,7 @@ Peterson.)
 urllib.parse
 ------------
 
-:func:`urllib.parse.quote` has been updated to from RFC 2396 to RFC 3986,
+:func:`urllib.parse.quote` has been updated from RFC 2396 to RFC 3986,
 adding `~` to the set of characters that is never quoted by default.
 (Contributed by Christian Theune and Ratnadeep Debnath in :issue:`16285`.)