fix: updated README screenshots (Fixes #4413)

[tejasashinde]

Description

The Yaru theme has evolved, and the screenshots in the README were outdated.

This PR updates the README screenshots to reflect the current appearance of Yaru, captured on Ubuntu 25.10.

Related Issue

Fixes #4413

Changes

• Replaced outdated screenshots in README
• Updated visuals to match the current Yaru theme
• Screenshots captured on Ubuntu 25.10 to reflect latest system appearance

Notes

Let me know if different screenshots or additional sections need updating.

Screenshots

[3v1n0]

Thanks for the contribution, however the images look stretched.

Please, use a 26.04 VM and rely on the GNOME screenshot feature via Print key to get either full screen screenshots window screenshots

[tejasashinde]

Hi @3v1n0,

I've updated the screenshots using a 26.04 VM (Resolute Raccoon) and captured them with the GNOME screenshot tool (Print key), as suggested. This should fix the stretching issue.

Let me know if anything else needs an update.

[3v1n0]

@tejasashinde I think you need to make sure you use the print key inside the VM not outside, make sure your keyboard is fully grabbed and also adjust the resolution inside the VM so that it's big enough and not shrank

[tejasashinde]

@3v1n0, I used the Print key inside the VM, which opened the “Take a Screenshot” window, and captured the Screen with the keyboard fully grabbed. The display resolution was set to 1920×1080, so the resulting images are at a sufficiently high resolution.

[3v1n0]

Keep the window smaller and use Alt+Print (or use the UI to inky select the window)
So that is similar size