Update build-a-hello-world-web-part.md for SPFx 1.22 gulp to heft mig…

[Ashlesha-MSFT]

Category

• Content fix

Related issues

• closes Update SPFx documentation and tutorials: Gulp-based toolchain → Heft (SPFx v1.22 GA) #10533

What's in this Pull Request?

Updated SPFx tutorials and documentation to replace the deprecated Gulp-based toolchain with the Heft-based toolchain as per SPFx v1.22 GA.
Changes include:

• Replacing gulp serve with heft start
• Replacing gulp bundle and gulp package-solution with Heft equivalents (heft build, heft bundle, heft package-solution)
• Updating related naming conventions to match Heft tooling

[learn-build-service-prod]

Learn Build status updates of commit 66b6821:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/spfx/web-parts/get-started/build-a-hello-world-web-part.md	✅Succeeded	View

For more details, please refer to the build report.

[learn-build-service-prod]

PoliCheck Scan Report

The following report lists PoliCheck issues in PR files. Before you merge the PR, you must fix all severity-1 and severity-2 issues. The AI Review Details column lists suggestions for either removing or replacing the terms. If you find a false positive result, mention it in a PR comment and include this text: #policheck-false-positive. This feedback helps reduce false positives in future scans.

✅ No issues found

More information about PoliCheck

Information: PoliCheck | Severity Guidance | Term
For any questions: Try searching the learn.microsoft.com contributor guides or post your question in the Learn support channel.

[Ashlesha-MSFT]

@VesaJuvonen
The WIP note [!INCLUDE [spfx-gulp-heft-migration-wip](../../../../includes/snippets/spfx-gulp-heft-migration-wip.md)] is removed in PR.

Could you please confirm if we should remove it now, or leave it until the tutorial is fully validated?