Update CHANGELOG.md with details from pull request #501

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

CHANGELOG.md

@@ -2,6 +2,7 @@
 ## Unreleased
 
 #### Merged Pull Requests
+- Move this secrets stuff into the label [#501](https://github.com/inspec/train/pull/501) ([miah](https://github.com/miah))
 - correct the path to the secret in vault [#500](https://github.com/inspec/train/pull/500) ([miah](https://github.com/miah))
 - the secret doesnt seem to be propagating to docker? [#499](https://github.com/inspec/train/pull/499) ([miah](https://github.com/miah))
 <!-- latest_release -->
@@ -10,6 +11,7 @@
 ### Changes not yet released to rubygems.org
 
 #### Merged Pull Requests
+- Move this secrets stuff into the label [#501](https://github.com/inspec/train/pull/501) ([miah](https://github.com/miah)) <!-- 2.1.33 -->
 - correct the path to the secret in vault [#500](https://github.com/inspec/train/pull/500) ([miah](https://github.com/miah)) <!-- 2.1.33 -->
 - the secret doesnt seem to be propagating to docker? [#499](https://github.com/inspec/train/pull/499) ([miah](https://github.com/miah)) <!-- 2.1.33 -->
 - that image isnt supported for accounts/secrets [#498](https://github.com/inspec/train/pull/498) ([miah](https://github.com/miah)) <!-- 2.1.33 -->