chore(deps): update dependency @slack/types to v2.8.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@slack/types (source)	2.7.0 -> 2.8.0

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Release Notes

slackapi/node-slack-sdk

### [`v2.8.0`](https://togithub.com/slackapi/node-slack-sdk/releases/tag/%40slack/types%402.8.0) [Compare Source](https://togithub.com/slackapi/node-slack-sdk/compare/@slack/types@2.7.0...@slack/types@2.8.0) #### What's Changed - Fix [#​1512](https://togithub.com/slackapi/node-slack-sdk/issues/1512) Add video block to Block Kit support by [@​seratch](https://togithub.com/seratch) in [https://github.com/slackapi/node-slack-sdk/pull/1514](https://togithub.com/slackapi/node-slack-sdk/pull/1514) - Add types for DateTimepicker, EmailInput, NumberInput and URLInput by [@​filmaj](https://togithub.com/filmaj) in [https://github.com/slackapi/node-slack-sdk/pull/1549](https://togithub.com/slackapi/node-slack-sdk/pull/1549) **Full Changelog**: https://github.com/slackapi/node-slack-sdk/compare/[@​slack/types](https://togithub.com/slack/types)[@​2](https://togithub.com/2).7.0...[@​slack/types](https://togithub.com/slack/types)[@​2](https://togithub.com/2).8.0

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