Docs: Updated the changelog

Author: rozza

docs/reference/content/changelog.md

@@ -14,7 +14,6 @@ Changes between released versions
   * Updated MongoDB Driver Async to 3.12.0
   * Refined GridFS binary stream interchange in GridFS [SCALA-569](https://jira.mongodb.org/browse/SCALA-569)
   * Reintroduced plain String query hint [SCALA-565](https://jira.mongodb.org/browse/SCALA-565)
-  * Deprecated org.mongo.scala.bson.codecs.DEFAULT_CODEC_REGISTRY [SCALA-562](https://jira.mongodb.org/browse/SCALA-562)
 
 ### 2.7.0
   * Updated MongoDB Driver Async to 3.11.0