ProfilePage is missing mainEntity

Just tested it on module version ^2.5, can confirm that it works great. Thank you!

I was keeping the merge request as a draft b/c I believed that it needs tests.

However, I'll let the maintainers decide that and have changed the merge request to Ready.

Thanks for the merge request, we'll try to review it soon.

As a reminder, when you're finished with your work please set the "Assigned" field to "Unassigned".

Rebased with 3.0.x branch and added the D11 in info.yml