Use new Discord markdown support for bot messages (#2726)

* feat: use new markdown feature in new help channel message

* feat(tags): update bullet points to dashes in tags

* feat(tags): add dashes to async libraries list

* feat: update markdown in patreon command

* feat: update markdown in otname command

* feat: update markdown in filter command

* feat: update markdown in voiceverify command

* feat: update markdown in docs command

* feat: update markdown in bigbrother command

* feat: update markdown in talentpool command

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