docs: Update tket2-py readme #1341

Job	Run time
Check for changes	6s
Build benchmarks 🏋️	3m 25s
Check Rust code 🦀	1m 16s
Check Python code 🐍	32s
tests (Rust 1.75)	2m 3s
tests (Rust stable, all features)	2m 1s
tests (Rust beta)	1m 42s
tests (Rust stable, no features)	1m 22s
tests (Rust nightly-2024-05-22)	1m 41s
tests (Python)	1m 7s
Check Python coverage 🐍	1m 53s
Required checks 🦀+🐍	1s
Check Rust coverage 🦀	2m 43s
	19m 52s

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