bump version to 4.0.0-alpha.29

[star-e]

Re: #

Changelog

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Continuous Integration

This pull request:

• needs automatic test cases check.

  Manual trigger with @cocos-robot run test cases afterward.

• does not change any runtime related code or build configuration

  If any reviewer thinks the CI checks are needed, please uncheck this option, then close and reopen the issue.

---

Compatibility Check

This pull request:

• changes public API, and have ensured backward compatibility with deprecated features.
• affects platform compatibility, e.g. system version, browser version, platform sdk version, platform toolchain, language version, hardware compatibility etc.
• affects file structure of the build package or build configuration which requires user project upgrade.
• introduces breaking changes, please list all changes, affected features and the scope of violation.

[star-e]

@cocos-robot run test cases

[github-actions]

Code Size Check Report

Wechat (WASM)	Before	After	Diff
2D Empty (legacy pipeline)	1014561 bytes	1014561 bytes	✅ 0 bytes
2D All (legacy pipeline)	2682237 bytes	2682237 bytes	✅ 0 bytes
2D All (new pipeline)	2774076 bytes	2774076 bytes	✅ 0 bytes
(2D + 3D) All	10031391 bytes	10031391 bytes	✅ 0 bytes

Web (WASM + ASMJS)	Before	After	Diff
(2D + 3D) All	16867805 bytes	16867805 bytes	✅ 0 bytes

Interface Check Report

This pull request does not change any public interfaces !

[github-actions]

@star-e, Please check the result of run test cases:

• Test Platform: PR-Test
• Editor Version: v4.0.0
• Task Result: FAIL
• Task URL: https://cctest.cocos.org/#/reportview/PR-TEST/a384dd80-431d-4620-bc58-af5961b9505d/-1
• GitHub Action: https://github.com/cocos/cocos4/actions/runs/30742749681

Task Details

Platform	build	boot	runned	crashScene	FailScene
web-mobile	PASS	PASS	FAIL		frame-anim
ios	PASS	PASS	PASS
mac	PASS	PASS	PASS

[github-actions]

@star-e, Please check the result of run test cases:

• Test Platform: PR-Test
• Editor Version: v4.0.0
• Task Result: PASS
• Task URL: https://cctest.cocos.org/#/reportview/PR-TEST/13d24bd5-e51e-4801-a075-ce0656b03ac0/-1
• GitHub Action: https://github.com/cocos/cocos4/actions/runs/30742749681

Task Details