fix(deps): update dependency @slack/web-api to v6.11.2

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@slack/web-api (source)	6.11.1 -> 6.11.2

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Release Notes

slackapi/node-slack-sdk (@​slack/web-api)

### [`v6.11.2`](https://togithub.com/slackapi/node-slack-sdk/releases/tag/%40slack/web-api%406.11.2) [Compare Source](https://togithub.com/slackapi/node-slack-sdk/compare/@slack/web-api@6.11.1...@slack/web-api@6.11.2) Bumps axios to 1.6.5 to address *another* security vulnerability.

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