Updated changelog information for v6.10.0.

 - Legacy-Id: 10490

Author: levkowetz

changelog

@@ -15,6 +15,9 @@ ietfdb (6.10.0) ietf; urgency=medium
   A more comprehensive setup description is available on the datatracker
   development wiki:  https://wiki.tools.ietf.org/tools/ietfdb/wiki/Docker
 
+  This release also introduces two tweaks to the test suite runner, which should
+  reduce the time it takes to run the test suite by around 50%.
+
   Commit log details:
 
   * Added a utility script docker/updatedb to download and load a new dump