Change UI changelog entries to be length-sorted

Thanks to @notnoop for letting me know about this:
#6007 (comment)

CHANGELOG.md

@@ -10,9 +10,9 @@ IMPROVEMENTS:
  * client: Removed extraneous information to improve formatting for hcl parsing error messages [[GH-5972](https://github.com/hashicorp/nomad/pull/5972)]
  * driver/docker: Added logging defaults to use json-file log driver with log rotation [[GH-5846](https://github.com/hashicorp/nomad/pull/5846)]
  * metrics: Added namespace label as appropriate to metrics [[GH-5847](https://github.com/hashicorp/nomad/issues/5847)]
- * ui: Moved client status, draining, and eligibility fields into single state column [[GH-5789](https://github.com/hashicorp/nomad/pull/5789)]
- * ui: Added buttons to copy client and allocation UUIDs [[GH-5926](https://github.com/hashicorp/nomad/pull/5926)]
  * ui: Added page titles [[GH-5924](https://github.com/hashicorp/nomad/pull/5924)]
+ * ui: Added buttons to copy client and allocation UUIDs [[GH-5926](https://github.com/hashicorp/nomad/pull/5926)]
+ * ui: Moved client status, draining, and eligibility fields into single state column [[GH-5789](https://github.com/hashicorp/nomad/pull/5789)]
 
 BUG FIXES: