chore: remove note about supported databases for Web Modeler (#4006)

Author: JacobiCamunda

charts/camunda-platform-8.8/values.yaml

@@ -1421,7 +1421,6 @@ webModeler:
     initContainers: []
 
     ## @extra webModeler.restapi.externalDatabase can be used to configure a connection to an external database; will only be applied if the postgresql dependency chart is disabled (with `postgresql.enabled=false`)
-    # Note: Currently, the only supported database system is PostgreSQL.
     externalDatabase:
       ## @param webModeler.restapi.externalDatabase.url (DEPRECATED - use host, port, and database instead) defines the JDBC url of the database instance.
       # Note: If url is provided, it takes precedence over individual connection parameters (host, port, database)