Update dependency sqlalchemy to v2.0.21

Author: renovate[bot]

requirements.txt

@@ -20,7 +20,7 @@ pyflakes==3.1.0 ; python_version >= "3.10" and python_version < "4.0"
 pymysql==1.1.0 ; python_version >= "3.10" and python_version < "4.0"
 pytest==7.4.0 ; python_version >= "3.10" and python_version < "4.0"
 python-dotenv==1.0.0 ; python_version >= "3.10" and python_version < "4.0"
-sqlalchemy==2.0.20 ; python_version >= "3.10" and python_version < "4.0"
+sqlalchemy==2.0.21 ; python_version >= "3.10" and python_version < "4.0"
 tomli==2.0.1 ; python_version >= "3.10" and python_version < "3.11"
 typing-extensions==4.7.1 ; python_version >= "3.10" and python_version < "4.0"
 win32-setctime==1.1.0 ; python_version >= "3.10" and python_version < "4.0" and sys_platform == "win32"