Formatting fix for JIRA issue in changelog

Author: jeff-allen-mongo

source/changelog.txt

@@ -23,7 +23,8 @@ API Additions
 This release adds support for the following APIs:
 
 - Admin commands such as :method:`db.killOp()` and
-  :method:`db.currentOp()`. More detail in :issue:`MONGOSH-307`.
+  :method:`db.currentOp()`. More detail in
+  :issue:`MONGOSH-307 <MONGOSH-307>`.
 
 - Free monitoring commands such as :method:`db.enableFreeMonitoring()`.
   More detail in  :issue:`MONGOSH-300 <MONGOSH-300>`.