chore: options readme

Author: mauricerenck

docs/options.md

@@ -35,3 +35,4 @@ or
 | sanitize            | `false`      | Enable to sanitize data after migration from version 2                        |
 | autoMigration       | `true`       | Disable this to not automatically migrate data (may help with low page speed) |
 | useApi              | `true`       | Use the Podcaster API for Apple categories and other meta data                |
+| compatibilityMode   | `false`      | Show deprecated fields in the panel to migrate them                           |