Fix docstrings in superset/config.py (#8931)

- Replace ldap with LDAP
- Replace `(username/password()` with `(username/password)`

superset/config.py

@@ -202,7 +202,7 @@ def _try_json_readsha(filepath, length):  # pylint: disable=unused-argument
 # ----------------------------------------------------
 # The authentication type
 # AUTH_OID : Is for OpenID
-# AUTH_DB : Is for database (username/password()
+# AUTH_DB : Is for database (username/password)
 # AUTH_LDAP : Is for LDAP
 # AUTH_REMOTE_USER : Is for using REMOTE_USER from web server
 AUTH_TYPE = AUTH_DB
@@ -219,7 +219,7 @@ def _try_json_readsha(filepath, length):  # pylint: disable=unused-argument
 # The default user self registration role
 # AUTH_USER_REGISTRATION_ROLE = "Public"
 
-# When using LDAP Auth, setup the ldap server
+# When using LDAP Auth, setup the LDAP server
 # AUTH_LDAP_SERVER = "ldap://ldapserver.new"
 
 # Uncomment to setup OpenID providers example for OpenID authentication