chore(deps): update dependency discord.net to v3.15.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Discord.Net	3.15.0 -> 3.15.1

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Release Notes

discord-net/Discord.Net (Discord.Net)

### [`v3.15.1`](https://togithub.com/discord-net/Discord.Net/blob/HEAD/CHANGELOG.md#3151---2024-06-18) [Compare Source](https://togithub.com/discord-net/Discord.Net/compare/3.15.0...3.15.1) ##### Added - [#​2927](https://togithub.com/discord-net/Discord.Net/issues/2927) Add missing PollProperties ([`a59f4ba`](https://togithub.com/discord-net/Discord.Net/commit/a59f4ba)) - [#​2942](https://togithub.com/discord-net/Discord.Net/issues/2942) Add purchase notification ([`9d92435`](https://togithub.com/discord-net/Discord.Net/commit/9d92435)) - [#​2934](https://togithub.com/discord-net/Discord.Net/issues/2934) Add MessageCallData ([`21195a8`](https://togithub.com/discord-net/Discord.Net/commit/21195a8)) - [#​2932](https://togithub.com/discord-net/Discord.Net/issues/2932) Config Bypass for CanSendResponse ([`9030a5b`](https://togithub.com/discord-net/Discord.Net/commit/9030a5b)) - [#​2933](https://togithub.com/discord-net/Discord.Net/issues/2933) Premium Buttons ([`531b5eb`](https://togithub.com/discord-net/Discord.Net/commit/531b5eb)) - [#​2941](https://togithub.com/discord-net/Discord.Net/issues/2941) Add UseExternalApps permission ([`f7f29d5`](https://togithub.com/discord-net/Discord.Net/commit/f7f29d5)) ##### Misc - [#​2936](https://togithub.com/discord-net/Discord.Net/issues/2936) Public constructor for Emote ([`3be72a8`](https://togithub.com/discord-net/Discord.Net/commit/3be72a8)) - [#​2935](https://togithub.com/discord-net/Discord.Net/issues/2935) Generic autocomplete ([`35b102a`](https://togithub.com/discord-net/Discord.Net/commit/35b102a)) - [#​2929](https://togithub.com/discord-net/Discord.Net/issues/2929) Enable nuget debug symbols. ([`aa424f6`](https://togithub.com/discord-net/Discord.Net/commit/aa424f6))

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