downgraded flag & flag_lists as flag_lists db upgrade failes

upgraded core to ^9.3

config/sync/mimemail.settings.yml

@@ -1,14 +1,14 @@
-format: full_html
+_core:
+  default_config_hash: 7mRdLbI-Rda0ePrw4IkNSJd8m_lTx7nLZnVfbNbyfwA
 name: ''
 mail: ''
-linkonly: false
-textonly: false
-sitestyle: true
 simple_address: false
-engine: mimemail
+sitestyle: true
+textonly: false
+linkonly: false
+format: full_html
 preserve_class: false
 advanced:
   incoming: false
   key: ''
-_core:
-  default_config_hash: 7mRdLbI-Rda0ePrw4IkNSJd8m_lTx7nLZnVfbNbyfwA
+engine: mimemail