Move changelog entry from bug fix to feature

It was never really implemented to begin with

CHANGELOG.md

@@ -1,9 +1,12 @@
 ## 0.8 (Unreleased)
 
+IMPROVEMENTS:
+ * discovery: Allow `check_restart` to be specified in the `service` stanza.
+   [GH-3718]
+
 BUG FIXES:
  * core: Fix search endpoint forwarding for multi-region clusters [[GH-3680](https://github.com/hashicorp/nomad/issues/3680)]
  * config: Revert minimum CPU limit back to 20 from 100.
- * discovery: Fix handling of `service.check_restart` [[GH-3718](https://github.com/hashicorp/nomad/issues/3718)]
 
 ## 0.7.1 (December 19, 2017)