Create the release summary

advertise pylint-errors integration

Author: Pierre-Sassoulas

doc/release.md

@@ -8,6 +8,8 @@ So, you want to release the `X.Y.Z` version of pylint ?
 the maintenance branch. If so, release a last patch release first. See
 `Releasing a patch version`.**
 
+- Write the `Summary -- Release highlights` in `doc/whatsnew` and upgrade the release
+  date.
 - Remove the empty changelog for the last unreleased patch version `X.Y-1.Z'`. (For
   example: `v2.3.5`)
 - Check the result of `git diff vX.Y-1.Z' ChangeLog`. (For example:

doc/whatsnew/2.13.rst

@@ -3,11 +3,29 @@
 ***************************
 
 :Release: 2.13
-:Date: TBA
+:Date: 2022-03-25
 
 Summary -- Release highlights
 =============================
 
+In 2.13, we introduced a new check to deal with unicode security issues. On top of that a lot of work was
+done inside the unicode checker by @CarliJoy. We also introduced a new check when importing private name
+and for unnecessary ellipsis among other.
+
+We fixed long standing issues related to duplicate code that could not be disabled, line numbers
+that were not accurate some of the time, and added the ability to lint all files in a directory without
+specifying each one. One of the most anticipated issue from the repository. Thank you @matusvalo !
+
+A lot of ``undefined-variables`` and ``used-before-assignment`` issues were resolved thanks to @jacobtylerwalls.
+
+We started integrating ``pylint-error`` the documentation created by @vald-phoenix a developer from Hlyniane,
+Ukraine. We hope he's doing well despite the current situation. Github pages is setup but `there's still a lot to do so we welcome any community
+help to review, integrate, and add good/bad examples <https://github.com/PyCQA/pylint/issues/5953>`_. This should be doable
+without any pylint or astroid knowledge, so this is the perfect entrypoint if you want to contribute
+to pylint without investing any time learning the internals.
+
+This release is the last one to support interpreter below 3.7.2, 3.6 end of life was reached in december 2021.
+
 New checkers
 ============