Use semibold (#47725)

Conrad Irwin created 

New on the left, old on the right:

<img width="1612" height="1047" alt="Screenshot 2026-01-26 at 20 31 04"
src="https://github.com/user-attachments/assets/3e0d01b6-05e9-4c9c-8c15-6c525ce9fa9f"
/>
<img width="1604" height="915" alt="Screenshot 2026-01-26 at 20 30 49"
src="https://github.com/user-attachments/assets/77d0f9e0-778b-45df-a8e1-ade63ee9e798"
/>


Release Notes:

- Bold UI text will now render using Plex SemiBold instead of Bold.

Change summary

assets/fonts/ibm-plex-sans/IBMPlexSans-Bold.ttf           | 0 
assets/fonts/ibm-plex-sans/IBMPlexSans-BoldItalic.ttf     | 0 
assets/fonts/ibm-plex-sans/IBMPlexSans-SemiBold.ttf       | 0 
assets/fonts/ibm-plex-sans/IBMPlexSans-SemiBoldItalic.ttf | 0 
4 files changed

Detailed changes