Install graphviz for check-pl-compat.yaml

[JerryChen97]

Context:
Fixing https://github.com/PennyLaneAI/catalyst/actions/runs/20520896254/job/58955948865

Description of the Change:

Benefits:

Possible Drawbacks:

Related GitHub Issues:

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.28%. Comparing base (b7d57bf) to head (567a43b).
⚠️ Report is 245 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2325   +/-   ##
=======================================
  Coverage   97.28%   97.28%           
=======================================
  Files         107      107           
  Lines       12947    12947           
  Branches     1076     1076           
=======================================
  Hits        12595    12595           
  Misses        290      290           
  Partials       62       62           

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[JerryChen97]

Now it works: https://github.com/PennyLaneAI/catalyst/actions/runs/20528845871/job/58976953529

[github-actions]

Hello. You may have forgotten to update the changelog!
Please edit doc/releases/changelog-dev.md on your branch with:

• A one-to-two sentence description of the change. You may include a small working example for new features.
• A link back to this PR.
• Your name (or GitHub username) in the contributors section.

[JerryChen97]

Wanna merge? @paul0403