Update CHANGELOG for upcoming release #501

Job	Run time
linux-gallery-python3.8-minimum	1m 16s
linux-python3.8-minimum	2m 30s
linux-gallery-python3.11-upgraded	1m 7s
windows-gallery-python3.8-minimum	2m 16s
linux-python3.11	2m 14s
windows-gallery-python3.11-upgraded	3m 2s
linux-python3.11-upgraded	2m 13s
windows-python3.8-minimum	4m 9s
conda-linux-python3.8-minimum	2m 35s
windows-python3.11-upgraded	4m 51s
conda-linux-python3.11-upgraded	2m 43s
macos-python3.8-minimum	4m 3s
macos-python3.11-upgraded	4m 34s
Deploy pre-release from dev	0s
	37m 33s

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