Bump mysqlclient from 2.2.0 to 2.2.6

Bumps [mysqlclient](https://github.com/PyMySQL/mysqlclient) from 2.2.0 to 2.2.6.
- [Release notes](https://github.com/PyMySQL/mysqlclient/releases)
- [Changelog](https://github.com/PyMySQL/mysqlclient/blob/main/HISTORY.rst)
- [Commits](https://github.com/PyMySQL/mysqlclient/commits)

---
updated-dependencies:
- dependency-name: mysqlclient
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

setup.py

@@ -184,7 +184,7 @@ def readme():
         ],
         "mysql": [
             "asyncmy==0.2.9",
-            "mysqlclient==2.2.0"
+            "mysqlclient==2.2.6"
         ],
         "mariadb": [
             "aiomysql==0.2.0"
@@ -283,7 +283,7 @@ def readme():
             "pymssql==2.3.1",
             "aiocouch==3.0.0",
             "asyncmy==0.2.9",
-            "mysqlclient==2.2.0",
+            "mysqlclient==2.2.6",
             "aiomysql==0.2.0",
             "pyspark==3.5.0",
             "oracledb==2.2.1",