Update monitor-alert-slack.md

[huoyao1125]

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[ti-chi-bot]

Hi @huoyao1125. Thanks for your PR.

I'm waiting for a pingcap member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[gemini-code-assist]

Summary of Changes

Hello @huoyao1125, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the TiDB Cloud documentation to reflect expanded alert notification capabilities. It specifically modifies the monitor-alert-slack.md file to inform users about the newly supported Flashduty and PagerDuty integration for receiving alert notifications, alongside existing options. Additionally, a minor formatting correction was applied to ensure the document adheres to standard file conventions.

Highlights

• Documentation Update: The introductory paragraph of monitor-alert-slack.md has been updated to include Flashduty and PagerDuty as additional supported alert notification channels for TiDB Cloud.
• File Formatting: A missing newline character at the end of monitor-alert-slack.md has been added, resolving a common file formatting issue.

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[gemini-code-assist]

Code Review

This pull request updates the monitor-alert-slack.md document to include Flashduty and PagerDuty as alert notification options. My review includes a minor suggestion to improve punctuation for better readability, in line with the documentation style guide. The change to add a newline at the end of the file is a good practice.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please ask for approval from hfxsd. For more information see the Code Review Process.
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[hfxsd]

/ok-to-test

[hfxsd]

Merged to #22364