docs: change from stateDiagram to stateDiagram-v2

[Malix-Labs]

📑 Summary

Change from stateDiagram to stateDiagram-v2 in the documentation

📏 Design Decisions

Simple "-v2" appending

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Latest commit: 0cd98a2

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[Copilot]

Pull request overview

This PR updates state diagram documentation examples to use the newer stateDiagram-v2 syntax instead of the legacy stateDiagram syntax.

• Updates four code examples in the state diagram documentation to use stateDiagram-v2
• Maintains consistency with the rest of the documentation where stateDiagram-v2 is already the standard

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 3.57%. Comparing base (d5bc07d) to head (0cd98a2).

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #7263      +/-   ##
==========================================
- Coverage     3.57%   3.57%   -0.01%     
==========================================
  Files          473     474       +1     
  Lines        47475   47486      +11     
  Branches       734     734              
==========================================
  Hits          1696    1696              
- Misses       45779   45790      +11     

Flag	Coverage Δ
unit	3.57% <ø> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.
see 1 file with indirect coverage changes

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commit: 0cd98a2

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Build	Status	Details	Updated (UTC)
default (Inspect)	✅ No changes detected	-	Dec 19, 2025, 2:50 PM

[Malix-Labs]

hope the bazillion AIs liked to review those 12 markdown LOC