Saner releases: improve drafts, handle offcycle releases, bump downstream projects (#4044)

* Switch prepublishOnly to prepack to catch errors earlier

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Fix merge-release-notes.js parsing

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Improve release drafts and make release-drafter handle offcycle releases better

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Tweak release-drafter config

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Automate downstream dependency bumping

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Remove duplicated docs

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Delint

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

---------

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

docs/SUMMARY.md

@@ -4,6 +4,5 @@
 
 # Deep dive
 
--   [Release Process](release.md)
 -   [Storage notes](storage-notes.md)
 -   [Unverified devices](warning-on-unverified-devices.md)

docs/release.md

@@ -1,24 +0,0 @@
-# Release Process
-
-## Hotfix and off-cycle releases
-
-1. Prepare the `staging` branch by using the backport automation and manually merging
-2. Go to [Releasing](#Releasing)
-
-## Release candidates
-
-1. Prepare the `staging` branch by running the [branch cut automation](https://github.com/vector-im/element-web/actions/workflows/release_prepare.yml)
-2. Go to [Releasing](#Releasing)
-
-## Releasing
-
-1. Open the [Releases page](https://github.com/matrix-org/matrix-js-sdk/releases) and inspect the draft release there
-2. Make any modifications to the release notes and tag/version as required
-3. Run [workflow](https://github.com/matrix-org/matrix-js-sdk/actions/workflows/release.yml) with the type set appropriately
-
-## Artifacts
-
-Releasing the Matrix JS SDK has just two artifacts:
-
--   Package published to [npm](https://github.com/matrix-org/matrix-js-sdk)
--   Docs published to [Github Pages](https://matrix-org.github.io/matrix-js-sdk/)