Update demo.md

[v-caxian]

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[prmerger-test]

@v-caxian : Thanks for your contribution! The author(s) have been notified to review your proposed change. @adunndevster

[learn-build-service-prod]

Learn Build status updates of commit 109bed2:

❌ Validation status: errors

Please follow instructions here which may help to resolve issue.

File	Status	Preview URL	Details
	❌Error		Details

• [Error: CannotFindPublishConfigFile] .openpublishing.publish.config.json couldn't be found under repository C:/LocalRun/W\lgob-s

For more details, please refer to the build report.

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