emulators/mupen64plus-qt: Update maintainer

[ultima]

Summary

• Update maintainer email

PR\: 220311
Sumitted by\: Dan <[e-mail]> (maintainer)
Reviewed by\: lifanov (mentor), matthew (mentor)
Approved by\: lifanov (mentor), matthew (mentor)
Differential Revision\: https://reviews.freebsd.org/DXXXXX

Test Plan

None needed

[lifanov]

Did you verify that it's the same maintainer? If so, approved!

[ultima]

In D11379#235490, @lifanov wrote:

Did you verify that it's the same maintainer? If so, approved!

Yes, it is the same maintainer that created the port a couple years ago, he just changed his mind about the email he wants to use.

[lifanov]

OK, approved for commit.