Merge #2332

2332: Correct typo r=mergify[bot] a=gliptak

## What type of PR?

documentation

## What does this PR do?

### Related issue(s)


## Prerequisites
Before we can consider review and merge, please make sure the following list is done and checked.
If an entry in not applicable, you can check it or remove it from the list.

- [ ] In case of feature or enhancement: documentation updated accordingly
- [x] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/workflow.html#changelog) entry file.


Co-authored-by: Gábor Lipták <gliptak@gmail.com>

docs/contributors/memo.rst

@@ -29,5 +29,5 @@ Update information files
 If you added a feature or fixed a bug or committed anything that is worth mentionning
 for the next upgrade, add it in the ``CHANGELOG.md`` file.
 
-Also, if you would like to be mentionned by name or add a comment in ``AUTHORS.md``,
+Also, if you would like to be mentioned by name or add a comment in ``AUTHORS.md``,
 feel free to do so.