fix: tibuild support dot in branch name

[jayl1e]

Why:

• update tibuild to fix gitRef regex

[ti-chi-bot]

I have already done a preliminary review for you, and I hope to help you do a better job.

Pull Request Review

This pull request fixes an issue with the tibuild process, which prevented it from correctly handling branch names containing dots. The proposed change updates the tibuild image to a new version (hub.pingcap.net/tibuild/tibuild:ba975d9) that includes a fix for the gitRef regex.

Potential Problems

The pull request looks good, but there are a few things to consider:

• It's unclear what impact this change will have on the system, so it may be necessary to test the updated tibuild image to make sure everything still works as expected.
• It's also unclear why the nodeSelector was added, and whether this change has been tested in the target environment.

Fixing Suggestions

• If possible, test the updated tibuild image to ensure that it works correctly with branch names containing dots.
• Add a comment to the pull request that explains the reasoning behind adding the nodeSelector, and whether it has been tested in the target environment.

[jayl1e]

/approve

[purelind]

/lgtm

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lijie0123, purelind

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Needs approval from an approver in each of these files:

• apps/prod/OWNERS [purelind]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-08-24 11:14:46.865022833 +0000 UTC m=+1407251.414038804: ☑️ agreed by purelind.