docs: release-guide link to release notes (#3989)

Closes #3913

(cherry picked from commit 0b3c516)

docs/maintainers/release-guide.md

@@ -30,7 +30,9 @@ The target audience for this guide is maintainers of this repo. In general, the
 Follow the [creating a release candidate](#creating-a-release-candidate) section with the following considerations:
 
 - The version tag should not include the `-rc` suffix.
+- If the release targets a testnet, suffix the release with `-arabica` or `-mocha`.
 - The release notes should contain an **Upgrade Notice** section with notable changes for node operators or library consumers.
+- The release notes section should contain a link to https://github.com/celestiaorg/celestia-app/blob/main/docs/release-notes/release-notes.md where we capture breaking changes
 
 After creating the release: