Fix wrong ACP parent module in add_webpush revert_data

[Copilot]

revert_data() in add_webpush referenced ACP_BOARD_CONFIGURATION as the parent module when removing the ACP entry, but update_data() installs it under ACP_CLIENT_COMMUNICATION. This mismatch meant the module entry was never cleaned up on disable/uninstall.

Change

• migrations/add_webpush.php — correct the module.remove parent from ACP_BOARD_CONFIGURATION to ACP_CLIENT_COMMUNICATION to match the install path:

// Before
['module.remove', ['acp', 'ACP_BOARD_CONFIGURATION', 'ACP_WEBPUSH_EXT_SETTINGS']]

// After
['module.remove', ['acp', 'ACP_CLIENT_COMMUNICATION', 'ACP_WEBPUSH_EXT_SETTINGS']]