Update mattermostautodriver requirement from ~=1.3.0 to ~=2.0.0

Updates the requirements on [mattermostautodriver](https://github.com/embl-bio-it/python-mattermost-autodriver) to permit the latest version.
- [Changelog](https://github.com/embl-bio-it/python-mattermost-autodriver/blob/main/CHANGELOG.rst)
- [Commits](embl-bio-it/python-mattermost-autodriver@1.3.0...2.0.0)

---
updated-dependencies:
- dependency-name: mattermostautodriver
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -1,4 +1,4 @@
 aiohttp>=3.7.4.post0
 click>=7.0
-mattermostautodriver~=1.3.0
+mattermostautodriver~=2.0.0
 schedule>=0.6.0