[MNT] testing code in README for correctness #398

Job	Run time
code-quality	19s
coverage (3.12 on ubuntu-latest	1m 17s
coverage (3.12 on macos-latest	1m 12s
notebooks (3.11)	1m 13s
coverage (3.12 on windows-latest	1m 30s
notebooks (3.14)	2m 31s
notebooks (3.10)	1m 11s
notebooks (3.13)	1m 19s
notebooks (3.12)	1m 15s
nosoftdeps (3.11, ubuntu-latest)	56s
nosoftdeps (3.10, ubuntu-latest)	51s
nosoftdeps (3.13, ubuntu-latest)	52s
nosoftdeps (3.12, macos-latest)	50s
nosoftdeps (3.13, macos-latest)	1m 30s
nosoftdeps (3.11, macos-latest)	54s
nosoftdeps (3.14, ubuntu-latest)	1m 19s
nosoftdeps (3.10, macos-latest)	1m 19s
nosoftdeps (3.14, macos-latest)	1m 18s
nosoftdeps (3.10, windows-latest)	2m 15s
nosoftdeps (3.11, windows-latest)	1m 49s
nosoftdeps (3.13, windows-latest)	1m 48s
nosoftdeps (3.12, windows-latest)	1m 44s
nosoftdeps (3.12, ubuntu-latest)	53s
nosoftdeps (3.14, windows-latest)	2m 54s
(${{ matrix.python-version }}, ${{ matrix.os }})	0s
	32m 59s

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