Fix minor typos in gcwooz.msg and rcfannie.msg

[NovaRain]

Noticed them when working on translation.

• gcwooz.msg - it's "Roentgen".
• rcfannie.msg - incorrect possessive.

[burner1024]

I probably should disable msg2po commits in PRs. Do you want access to the repo, by the way?

[NovaRain]

As a collaborator? Sure, if you're OK with not reviewing commits first.