add line updateColor function

[zxx43]

Re: #

Changelog

---

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.

[github-actions]

Code Size Check Report

Wechat (WASM)	Before	After	Diff
2D Empty (legacy pipeline)	1015436 bytes	1015436 bytes	✅ 0 bytes
2D All (legacy pipeline)	2683579 bytes	2683579 bytes	✅ 0 bytes
2D All (new pipeline)	2775832 bytes	2775832 bytes	✅ 0 bytes
(2D + 3D) All	10033274 bytes	10033405 bytes	⚠️ +131 bytes

Web (WASM + ASMJS)	Before	After	Diff
(2D + 3D) All	16869692 bytes	16869823 bytes	⚠️ +131 bytes

Interface Check Report

! WARNING this pull request has changed these public interfaces:

@@ -46637,8 +46637,9 @@
         onLoad(): void;
         onEnable(): void;
         onDisable(): void;
         protected _attachToScene(): void;
+        updateColor(): void;
         protected _onMaterialModified(index: number, material: Material | null): void;
     }
     /**
      * @en

[zxx43]

@cocos-robot run test cases

[github-actions]

@zxx43, 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/bb4ad2f1-0308-45bf-9b61-6bd73d7ca074/-1
• GitHub Action: https://github.com/cocos/cocos4/actions/runs/33354534017

Task Details

Platform	build	boot	runned	crashScene	FailScene
web-mobile	PASS	PASS	FAIL		graphics-continuous-filling
ios	PASS	PASS	PASS
mac	PASS	PASS	PASS

[github-actions]

@zxx43, 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/887960d7-ab5c-4c6f-8580-9336c29dd1d6/-1
• GitHub Action: https://github.com/cocos/cocos4/actions/runs/33354534017

Task Details