Bump mysql-connector-python in /mysql_cluster_manager

Bumps [mysql-connector-python](https://github.com/mysql/mysql-connector-python) from 8.0.22 to 9.1.0.
- [Changelog](https://github.com/mysql/mysql-connector-python/blob/trunk/CHANGES.txt)
- [Commits](mysql/mysql-connector-python@8.0.22...9.1.0)

---
updated-dependencies:
- dependency-name: mysql-connector-python
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

mysql_cluster_manager/requirements.txt

@@ -1,4 +1,4 @@
-mysql-connector-python==8.0.22 
+mysql-connector-python==9.1.0 
 netifaces==0.10.9
 pylint==2.5.3
 python-consul2==0.1.4