Update the release script to remind releaser to check for special release notes. (#16461)

* Add reminder to check special release notes board in release script

* Newsfile

Signed-off-by: Olivier Wilkinson (reivilibre) <oliverw@matrix.org>

* Update release.py

* Bah, black

---------

Signed-off-by: Olivier Wilkinson (reivilibre) <oliverw@matrix.org>

changelog.d/16461.misc

@@ -0,0 +1 @@
+Update the release script to remind releaser to check for special release notes.

scripts-dev/release.py

@@ -684,6 +684,10 @@ def full(gh_token: str) -> None:
     click.echo("1. If this is a security release, read the security wiki page.")
     click.echo("2. Check for any release blockers before proceeding.")
     click.echo("    https://github.com/matrix-org/synapse/labels/X-Release-Blocker")
+    click.echo(
+        "3. Check for any other special release notes, including announcements to add to the changelog or special deployment instructions."
+    )
+    click.echo("    See the 'Synapse Maintainer Report'.")
 
     click.confirm("Ready?", abort=True)