Adding UK MHRA to governments.yml

[rjkerrison]

Your Organization: MHRA
GitHub Organization url: @MHRA
Country/Locality: United Kingdom

Inclusion requirements:

• Referenced account is an Organization not a User^
• If this is a government project, your Organization's description should include a reference to your country/agency.
• Make sure your Organization includes at least one public repository
• Please also include a URL for your organization that links back to your organization or agency homepage.

[rjkerrison]

The run failed because rijksoverheid is not an organization.

https://github.com/github/government.github.com/pull/832/checks?check_run_id=1097238991#step:4:251

I don't think I should remove it here.

[rjkerrison]

It looks like rijksoverheid was created way back at 00d637c, but just today the organization @Rijksoverheid was created. Maybe it was removed and recreated, I can't tell.