Update CHANGELOG.md to reflect the promotion of 1.5.1

Obvious fix; these changes are the result of automation not creative thinking.

CHANGELOG.md

@@ -1,26 +1,23 @@
 # chefstyle change log
 
-<!-- latest_release 1.5.1 -->
-## [v1.5.1](https://github.com/chef/chefstyle/tree/v1.5.1) (2020-11-12)
-
-#### Merged Pull Requests
-- Upgrade to RuboCop 1.3.0 [#112](https://github.com/chef/chefstyle/pull/112) ([tas50](https://github.com/tas50))
+<!-- latest_release -->
 <!-- latest_release -->
 
-<!-- release_rollup since=1.5.0 -->
-### Changes not yet released to rubygems.org
-
-#### Merged Pull Requests
-- Upgrade to RuboCop 1.3.0 [#112](https://github.com/chef/chefstyle/pull/112) ([tas50](https://github.com/tas50)) <!-- 1.5.1 -->
+<!-- release_rollup -->
 <!-- release_rollup -->
 
 <!-- latest_stable_release -->
+## [v1.5.1](https://github.com/chef/chefstyle/tree/v1.5.1) (2020-11-12)
+
+#### Merged Pull Requests
+- Upgrade to RuboCop 1.3.0 [#112](https://github.com/chef/chefstyle/pull/112) ([tas50](https://github.com/tas50))
+<!-- latest_stable_release -->
+
 ## [v1.5.0](https://github.com/chef/chefstyle/tree/v1.5.0) (2020-11-05)
 
 #### Merged Pull Requests
 - Update to RuboCop 1.2 [#110](https://github.com/chef/chefstyle/pull/110) ([tas50](https://github.com/tas50))
 - Enable new cops [#111](https://github.com/chef/chefstyle/pull/111) ([tas50](https://github.com/tas50))
-<!-- latest_stable_release -->
 
 ## [v1.4.5](https://github.com/chef/chefstyle/tree/v1.4.5) (2020-10-12)