Update CHANGELOG.md to reflect the promotion of 3.11.29

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

CHANGELOG.md

@@ -1,25 +1,22 @@
 # Mixlib::Install Changes
 
-<!-- latest_release 3.11.29 -->
+<!-- latest_release -->
+<!-- latest_release -->
+<!-- release_rollup -->
+<!-- release_rollup -->
+
+<!-- latest_stable_release -->
 ## [v3.11.29](https://github.com/chef/mixlib-install/tree/v3.11.29) (2020-03-09)
 
 #### Merged Pull Requests
 - Map arm64 architecture to aarch64 [#309](https://github.com/chef/mixlib-install/pull/309) ([jaymalasinha](https://github.com/jaymalasinha))
-<!-- latest_release -->
-<!-- release_rollup since=3.11.28 -->
-### Changes not yet released to rubygems.org
-
-#### Merged Pull Requests
-- Map arm64 architecture to aarch64 [#309](https://github.com/chef/mixlib-install/pull/309) ([jaymalasinha](https://github.com/jaymalasinha)) <!-- 3.11.29 -->
-<!-- release_rollup -->
-
 <!-- latest_stable_release -->
+
 ## [v3.11.28](https://github.com/chef/mixlib-install/tree/v3.11.28) (2020-03-05)
 
 #### Merged Pull Requests
 - updated powershell template to support airgapped artifact environment… [#299](https://github.com/chef/mixlib-install/pull/299) ([Romascopa](https://github.com/Romascopa))
 - Add support for arm64 architecture [#308](https://github.com/chef/mixlib-install/pull/308) ([jaymalasinha](https://github.com/jaymalasinha))
-<!-- latest_stable_release -->
 
 ## [v3.11.26](https://github.com/chef/mixlib-install/tree/v3.11.26) (2019-12-30)