fix(WebhookClient): Updated webhook url to include old url

[bleuthoot-sven]

Please describe the changes this PR makes and why it should be merged:

Fixed the webhook url to include the old discordapp.com url. When copying a webhook URL directly from Discord, it still uses the old URL. This causes the URL check to fail, even though it is a valid URL.

Quite some time ago, this check was not added or removed because discord was switching to the discord.com URL. However, as of writing this Merge Request, discord still uses the old discordapp.com URL when copying a webhook URL using the client. Someone else tried to fix this, but it was mentioned it was an intentional change.

I would like for this to be added (back), because discord still uses discordapp.com when copying the url.

https://i.imgur.com/6WENtTf.mp4

Status and versioning classification:

• Code changes have been tested against the Discord API, or there are no code changes
• I know how to update typings and have done so, or typings don't need updating

[almeidx]

The up-to-date clients use the discord.com domain

[imranbarbhuiya]

#6192 (comment)

[bleuthoot-sven]

The up-to-date clients use the discord.com domain

I am pretty sure my discord client is up-to-date, since I just installed this client today.

[xHyroM]

The up-to-date clients use the discord.com domain

I am pretty sure my discord client is up-to-date, since I just installed this client today.

Are you sure? I tested it now on Stable 123305 (2d81cde3774b39f14994d35176c48e61fd1bf371) and Canary 12387 (14782d332eb3ca362a797e79fcf9f3eab3a2d2b2) and discord returns me the url (canary).discord.com when I copy the links.

[bleuthoot-sven]

The up-to-date clients use the discord.com domain

I am pretty sure my discord client is up-to-date, since I just installed this client today.

Are you sure? I tested it now on Stable 123305 (2d81cde3774b39f14994d35176c48e61fd1bf371) and Canary 12387 (14782d332eb3ca362a797e79fcf9f3eab3a2d2b2) and discord returns me the url (canary).discord.com when I copy the links.

Ok, this is weird. I just booted up my PC again without changing anything and it seems to be updated and use the correct url now. Weird because I would assume a newly installed discord installation would have the most recent version installed.

I apologize for wasting your time. I will try to check better next time.