Bump actions/add-to-project from 0.5.0 to 0.6.0 #1746

Job	Run time
linux-gallery-python3.12-upgraded	58s
linux-gallery-python3.8-minimum	51s
windows-gallery-python3.12-upgraded	1m 58s
windows-gallery-python3.8-minimum	1m 33s
linux-python3.12	1m 48s
linux-python3.12-upgraded	1m 33s
linux-python3.8-minimum	1m 21s
macos-python3.12-upgraded	1m 48s
macos-python3.8-minimum	1m 44s
windows-python3.12-upgraded	1m 24s
windows-python3.8-minimum	1m 15s
conda-linux-python3.12-upgraded	1m 20s
conda-linux-python3.8-minimum	55s
linux-gallery-python3.12-ros3	18s
Deploy pre-release from dev	0s
	18m 46s

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