Update dependency discuss to v1.2.1

Created by: renovate[bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
discuss	1.2.0 -> 1.2.1

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Release Notes

discussjs/discuss

v1.2.1: 🎉 1.2.1

Compare Source

build: 更新依赖 msg-alert@1.0.0-beta.4

Full Changelog: https://github.com/discussjs/discuss/compare/v1.2.0...v1.2.1

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