Update CHANGELOG.md

Author: dblythy

CHANGELOG.md

@@ -139,6 +139,7 @@ ___
 - Fix LiveQuery server crash when using $all query operator on a missing object key (Jason Posthuma) [#7421](https://github.com/parse-community/parse-server/pull/7421)
 - Added runtime deprecation warnings (Manuel Trezza) [#7451](https://github.com/parse-community/parse-server/pull/7451)
 - Add ability to pass context of an object via a header, X-Parse-Cloud-Context, for Cloud Code triggers. The header addition allows client SDK's to add context without injecting _context in the body of JSON objects (Corey Baker) [#7437](https://github.com/parse-community/parse-server/pull/7437)
+- Allow setting descending sort to full text queries (dblythy) [#7496](https://github.com/parse-community/parse-server/pull/7496)
 
 ___
 ## 4.5.0