Add AzureSignalR to list of required Service Tags in online requirements

[maustinjones]

Add AzureSignalR to list of required Service Tags in online requirements. This service is being used by collaboration features in Power Apps maker experiences.

[learn-build-service-prod]

Learn Build status updates of commit 5dfbba8:

✅ Validation status: passed

File	Status	Preview URL	Details
power-platform/admin/online-requirements.md	✅Succeeded

For more details, please refer to the build report.

[learn-build-service-prod]

Learn Build status updates of commit bbd5f88:

❌ Validation status: errors

Please follow instructions here which may help to resolve issue.

File	Status	Preview URL	Details
	❌Error		Details

• [Error: CannotMergeCommit] Cannot merge commit bbd5f88f4f1a2ff7ebf286c47aaac01bc549c44a in branch austinj/azuresignalr_requirement of repository https://github.com/maustinjones/power-platform into branch main (commit 094ad3b360df3710c9e1a22b2435a93d6535c002). Please follow this documentation: https://help.github.com/articles/resolving-a-merge-conflict-using-the-command-line/ to use git.exe to resolve you content conflicts locally and then push to remote.

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.

[learn-build-service-prod]

Learn Build status updates of commit 53f6202:

✅ Validation status: passed

File	Status	Preview URL	Details
power-platform/admin/online-requirements.md	✅Succeeded

For more details, please refer to the build report.