build(deps): update team-reflex/discord-php requirement (#2033)

Updates the requirements on [team-reflex/discord-php](https://github.com/discord-php/DiscordPHP) to permit the latest version.
- [Release notes](https://github.com/discord-php/DiscordPHP/releases)
- [Changelog](https://github.com/discord-php/DiscordPHP/blob/master/CHANGELOG.md)
- [Commits](discord-php/DiscordPHP@v10.3.8...v10.4.0)

---
updated-dependencies:
- dependency-name: team-reflex/discord-php
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

composer.json

@@ -14,7 +14,7 @@
 		"php": "^8.2",
 		"php-di/php-di": "7.0.9",
 		"phpmailer/phpmailer": "6.9.3",
-		"team-reflex/discord-php": "10.3.8",
+		"team-reflex/discord-php": "10.4.0",
 		"vanilla/nbbc": "2.6.0"
 	},
 	"autoload": {