docs(readme): fix platform support matrix (opener supports mobile)

Author: FabianLars

README.md

@@ -22,7 +22,7 @@ This repo and all plugins require a Rust version of at least **1.77.2**
 | [log](plugins/log)                             | Configurable logging.                                                                                                                                          | ✅  | ✅  | ✅  | ✅  | ✅  |
 | [nfc](plugins/nfc)                             | Read and write NFC tags on Android and iOS.                                                                                                                    | ?   | ?   | ?   | ✅  | ✅  |
 | [notification](plugins/notification)           | Send message notifications (brief auto-expiring OS window element) to your user. Can also be used with the Notification Web API.                               | ✅  | ✅  | ✅  | ✅  | ✅  |
-| [opener](plugins/opener)                       | Open files and URLs using their default application.                                                                                                           | ✅  | ✅  | ✅  | ?   | ?   |
+| [opener](plugins/opener)                       | Open files and URLs using their default application.                                                                                                           | ✅  | ✅  | ✅  | ✅  | ✅  |
 | [os](plugins/os)                               | Read information about the operating system.                                                                                                                   | ✅  | ✅  | ✅  | ✅  | ✅  |
 | [persisted-scope](plugins/persisted-scope)     | Persist runtime scope changes on the filesystem.                                                                                                               | ✅  | ✅  | ✅  | ?   | ?   |
 | [positioner](plugins/positioner)               | Move windows to common locations.                                                                                                                              | ✅  | ✅  | ✅  | ❌  | ❌  |