Add baseline alignment to status text in SUStatus dialog

[Eitot]

This adds a baseline-alignment constraint to the status text field in the SUStatus dialog to align it with the button on the right-hand side.

Misc Checklist

• My change requires a documentation update on Sparkle's website repository
• My change requires changes to generate_appcast, generate_keys, or sign_update

Testing

I tested and verified my change by using one or multiple of these methods:

• Sparkle Test App
• Unit Tests
• My own app
• Other (please specify)

(Describe all the cases that were tested)

macOS version tested: [place version here]

[zorgiepoo]

Thanks.