False alerts caused by incorrect regex url for `rich_embed` filter

[Senjan21]

Due to discord adding hyperlinking for users, the bot may mistakenly alert moderators about user embed.
Hyperlinks looks as follows: [example](https://google.com)

The regex we use here would match the string https://google.com) and check it against embed.url here which would cause a mismatch since Discord's embed.url would be https://google.com.

The solution might be as simple as adding [^\)] after \S+ to the regex pattern.

[lemonyte]

I believe changing the regex to (https?://[^\)\s]+) will produce the desired result.

Regex101 test cases:

• (https?://\S+) (original)
• (https?://\S+[^\)]) (proposed by Senjan21)
• (https?://[^\)\s]+)

If no one objects, I can implement this fix.

[Senjan21]

Sounds good to me though am not an expert on regex, I assigned you for this issue so feel free to work on it. 👍