some notes around the release process

README.md

@@ -5,7 +5,12 @@ Scripting language focused on processing tabular data.
 ---
 When a release is ready, simply create a release tag and push it to Github.
 The release workflow will take care of the build and release creation.
+**The release body uses [RELEASE.md](./RELEASE.md) as the release notes.
+Be sure to update this before the tag push!**
+
 ```
+# Update RELEASE.md
+git push
 git tag v#.#
 git push origin v#.#
 ```