docs: sqlalchemy link update

following to this change: apache#22114

airflow/config_templates/default_airflow.cfg

@@ -260,7 +260,7 @@ sql_alchemy_pool_recycle = 1800
 # Check connection at the start of each connection pool checkout.
 # Typically, this is a simple statement like "SELECT 1".
 # More information here:
-# https://docs.sqlalchemy.org/en/13/core/pooling.html#disconnect-handling-pessimistic
+# https://docs.sqlalchemy.org/en/14/core/pooling.html#disconnect-handling-pessimistic
 sql_alchemy_pool_pre_ping = True
 
 # The schema to use for the metadata database.
@@ -270,7 +270,7 @@ sql_alchemy_schema =
 # Import path for connect args in SqlAlchemy. Defaults to an empty dict.
 # This is useful when you want to configure db engine args that SqlAlchemy won't parse
 # in connection string.
-# See https://docs.sqlalchemy.org/en/13/core/engines.html#sqlalchemy.create_engine.params.connect_args
+# See https://docs.sqlalchemy.org/en/14/core/engines.html#sqlalchemy.create_engine.params.connect_args
 # sql_alchemy_connect_args =
 
 # Whether to load the default connections that ship with Airflow. It's good to