DTSPO-18355: Update readme to add release information (#215)

* DTSPO-18355: Update readme

README.md

@@ -184,3 +184,8 @@ A build is triggered when pull requests are created. This build will run `helm l
 ### Release Build
 
 Triggered when the repository is tagged (e.g. when a release is created). Also performs linting and testing, and will publish the chart to ACR on success.
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+### Releases
+We use semantic versioning via GitHub releases to handle new releases of this application chart, this is done via automation called Release Drafter. When you merge a PR to master, a new draft release will be created.
+More information is available about the [release process and how to create draft releases for testing purposes in more depth](https://hmcts.github.io/ops-runbooks/Testing-Changes/drafting-a-release.html)