Add DiscordBM/DiscordLogger to loggers list (apple#257)

* Add DiscordBM/DiscordLogger to loggers list

Adds [DiscordBM](https://github.com/MahdiBM/DiscordBM/blob/discord-logger/README.md#discord-logger) to the logger list.

The description is:

> a Discord package containing a standalone [DiscordLogger library](https://github.com/MahdiBM/DiscordBM/blob/discord-logger/README.md#discord-logger)

Please do tell if you think "standalone" is misleading 🤔 I'm just trying to imply that users don't need to depend on the full package just for Discord-logging.

Resolves apple#256

* Update README.md

---------

Co-authored-by: Konrad `ktoso` Malawski <[email protected]>

Author: MahdiBM

README.md

@@ -85,6 +85,7 @@ As the API has just launched, not many implementations exist yet. If you are int
 | [ShivaHuang/swift-log-SwiftyBeaver](https://github.com/ShivaHuang/swift-log-SwiftyBeaver) | a logging backend for printing colored logging to Xcode console / file, or sending encrypted logging to [SwiftyBeaver](https://swiftybeaver.com) platform. |
 | [Apodini/swift-log-elk](https://github.com/Apodini/swift-log-elk) | a logging backend that formats, caches and sends log data to [elastic/logstash](https://github.com/elastic/logstash) |
 | [binaryscraping/swift-log-supabase](https://github.com/binaryscraping/swift-log-supabase) | a logging backend that sends log entries to [Supabase](https://github.com/supabase/supabase). |
+| [MahdiBM/DiscordBM](https://github.com/MahdiBM/DiscordBM) | a Discord client package containing a standalone [DiscordLogger library](https://github.com/MahdiBM/DiscordBM/blob/discord-logger/README.md#discord-logger) |
 | Your library? | [Get in touch!](https://forums.swift.org/c/server) |
 
 ## What is an API package?