Update README badges

[martincostello]

Refactor the badges to try and make it so there's less to manually maintain when there's a new release.

[Copilot]

Pull Request Overview

Updates the README badges in the compatibility table to make them more maintainable by using dynamic badges that automatically pull version information from GitHub releases instead of hardcoded version numbers.

• Replaced hardcoded version badges with dynamic GitHub release badges for the latest v9 release
• Updated CI badge to pull version from build configuration files
• Converted static version badges for v8 and v7 to use consistent labeling

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.28%. Comparing base (a955418) to head (e39448c).
⚠️ Report is 1 commits behind head on master.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3597   +/-   ##
=======================================
  Coverage   94.28%   94.28%           
=======================================
  Files         110      110           
  Lines        3816     3816           
  Branches      723      723           
=======================================
  Hits         3598     3598           
  Misses        218      218           

Flag	Coverage Δ
Linux	94.28% <ø> (ø)
Windows	94.28% <ø> (ø)
macOS	94.28% <ø> (ø)

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