MNT: (deps-dev): Bump mysql-connector-python from 9.0.0 to 9.1.0 in /ci

Bumps [mysql-connector-python](https://github.com/mysql/mysql-connector-python) from 9.0.0 to 9.1.0.
- [Changelog](https://github.com/mysql/mysql-connector-python/blob/trunk/CHANGES.txt)
- [Commits](mysql/mysql-connector-python@9.0.0...9.1.0)

---
updated-dependencies:
- dependency-name: mysql-connector-python
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

ci/requirements_dev.txt

@@ -6,7 +6,7 @@ xlrd>=1.0.0
 netcdf4==1.7.1.post2
 cftime==1.6.4
 erddapy==2.2.3
-mysql-connector-python==9.0.0
+mysql-connector-python==9.1.0
 ctd==1.4.6 #python-ctd
 seawater==3.3.5
 #geomag cmweis github version... part of package