chore(main): release 2.3.1

[github-actions[bot]]

:robot: I have created a release beep boop

2.3.1 (2024-08-15)

Bug Fixes

• deps: update dependency matplotlib to v3.9.1 (#56) (ed3cc08)
• scripts/build-gh-pages: add code selector for pygments styles (#69) (6699255)

Documentation

• readme: add matplotlib contributors to thanks section (1695f2f)

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