deps: Bump Yaru to 6.0.0

[ashuntu]

Bumps Yaru to 6.0.0 (and yaru_test to 0.3.0), which includes my fix for the title bar, as pictured here:

(Also note the new dark mode colors from Yaru 6)

---

UDENG-5691

[CarlosNihelton]

Is this little artifact at the top right corner an issue with the screenshot or does it exist for real?

[ashuntu]

Is this little artifact at the top right corner an issue with the screenshot or does it exist for real?

It's an artifact of the screenshot

Edit:
Here's one for perspective:

[CarlosNihelton]

What a great closing for this year ;)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.21%. Comparing base (d98990d) to head (55999d2).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1032      +/-   ##
==========================================
- Coverage   89.25%   89.21%   -0.05%     
==========================================
  Files         112      112              
  Lines        7498     7498              
==========================================
- Hits         6692     6689       -3     
- Misses        631      633       +2     
- Partials      175      176       +1     

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