Added release notes

Author: uscholdm

docs/release_notes/issue-396-message-definition.md

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+### Patch Updates
+
+- Made minor wording corrections to annotations. Issue [#396](https://github.com/semanticarts/gist/issues/396).
+
+(Note to release manager: This release note is written in general terms, assuming other similar changes might be made in the release. These kinds of changes can be grouped together with a single note like above without providing an unnecessary level of detail.)