fix(permissions): typo in docs URL (discordjs#503)

Author: papaia

guide/popular-topics/permissions.md

@@ -296,7 +296,7 @@ discord.js features two utility methods to easily determine the final permission
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-discord.js features two utility methods to easily determine the final permissions for a guild member or role in a specific channel: `.permissionsFor()` on the [GuildChannel](https://discord.js.org/#/docs/main/stable/class/GuildChannel?scrollTo=permissionsFor) class and `.permissionsIn()` on the [GuildMember](https://discord.js.org/#/docs/main/stable/class/GuildMember?scrollTo=permissionsIn)and [Role](https://discord.js.org/#/docs/main/stable/class/Role?scrollTo=permissionsIn) classes. Both return a [Permissions](hhttps://discord.js.org/#/docs/main/stable/class/Permissions) object.
+discord.js features two utility methods to easily determine the final permissions for a guild member or role in a specific channel: `.permissionsFor()` on the [GuildChannel](https://discord.js.org/#/docs/main/stable/class/GuildChannel?scrollTo=permissionsFor) class and `.permissionsIn()` on the [GuildMember](https://discord.js.org/#/docs/main/stable/class/GuildMember?scrollTo=permissionsIn)and [Role](https://discord.js.org/#/docs/main/stable/class/Role?scrollTo=permissionsIn) classes. Both return a [Permissions](https://discord.js.org/#/docs/main/stable/class/Permissions) object.
 
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