Add "Publishing new versions" to README

README.md

@@ -58,6 +58,14 @@ Release notes are stored in the src/content/releases directory as `.md` files. T
 
 Within the release's `.md` file, frontmatter is used to create a page title, while the rest of the content is parsed using `gatsby-transformer-remark` and styled with selectors in `src/styles/formatting.js`.
 
+### Publishing new versions
+
+When a pre-release version graduates to stable (and a new pre-release version is cut):
+
+1. Make sure all relevant [release notes](#release-notes) are present and correct
+2. Add the version that _was_ "latest" to the [Netlify branch deploy setting](https://app.netlify.com/sites/storybook-frontpage/settings/deploys)
+    - e.g. if "latest" was `6.3`, add `release-6-3`
+
 ### Search
 
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