[MNT] testing code in README for correctness #396

Job	Run time
code-quality	22s
coverage (3.12 on ubuntu-latest	1m 20s
coverage (3.12 on windows-latest	2m 56s
coverage (3.12 on macos-latest	1m 9s
notebooks (3.12)	1m 18s
notebooks (3.13)	1m 22s
notebooks (3.14)	2m 15s
notebooks (3.11)	1m 16s
notebooks (3.10)	1m 18s
nosoftdeps (3.13, ubuntu-latest)	55s
nosoftdeps (3.11, ubuntu-latest)	50s
nosoftdeps (3.12, ubuntu-latest)	55s
nosoftdeps (3.14, ubuntu-latest)	1m 20s
nosoftdeps (3.10, ubuntu-latest)	54s
nosoftdeps (3.10, macos-latest)	1m 27s
nosoftdeps (3.13, macos-latest)	49s
nosoftdeps (3.10, windows-latest)	1m 40s
nosoftdeps (3.11, macos-latest)	49s
nosoftdeps (3.14, macos-latest)	1m 7s
nosoftdeps (3.12, windows-latest)	2m 16s
nosoftdeps (3.12, macos-latest)	52s
nosoftdeps (3.11, windows-latest)	1m 53s
nosoftdeps (3.14, windows-latest)	2m 54s
nosoftdeps (3.13, windows-latest)	1m 36s
(${{ matrix.python-version }}, ${{ matrix.os }})	1s
	33m 34s

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