Add doc to H5DataIO.dataset setter #2147

Job	Run time
linux-gallery-python3.12-upgraded	57s
linux-gallery-python3.8-minimum	53s
windows-gallery-python3.12-upgraded	1m 43s
windows-gallery-python3.8-minimum	1m 30s
linux-python3.12-ros3	1m 20s
linux-python3.12	1m 59s
linux-python3.12-upgraded	2m 1s
macos-python3.12-upgraded	1m 12s
linux-python3.8-minimum	1m 52s
macos-python3.8-minimum	2m 27s
windows-python3.12-upgraded	2m 45s
conda-linux-python3.12-upgraded	2m 24s
windows-python3.8-minimum	2m 52s
conda-linux-python3.8-minimum	2m 20s
Deploy pre-release from dev	0s
	26m 15s

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