Update description in overview.rst #529

Job	Run time
linux-gallery-python3.8-minimum	1m 4s
linux-gallery-python3.11-upgraded	1m 13s
windows-gallery-python3.8-minimum	2m 51s
windows-gallery-python3.11-upgraded	2m 21s
conda-linux-python3.8-minimum	2m 36s
conda-linux-python3.11-upgraded	2m 47s
linux-python3.8-minimum	5m 18s
linux-python3.11	2m 15s
linux-python3.11-upgraded	3m 17s
windows-python3.8-minimum	4m 35s
windows-python3.11-upgraded	7m 18s
macos-python3.8-minimum	5m 31s
macos-python3.11-upgraded	3m 36s
Deploy pre-release from dev	0s
	44m 42s

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