Merge #2208 (DougBurke) - BUILD: update ds9 from 8.5 to 8.6 #1045

Job	Run time
MacOS Intel Full Build (Python 3.11)	49m 56s
MacOS ARM Full Build (Python 3.11)	26m 33s
Linux Minimum Setup (Python 3.10)	6m 42s
Linux Minimum Setup (Python 3.11)	6m 33s
Linux Full Build (Python 3.12)	29m 44s
Linux Full Build (Python 3.11)	28m 33s
Linux Full Build (Python 3.10)	26m 43s
Linux Build (w/o Astropy or Xspec)	8m 45s
Linux Build (w/o Matplotlib, Xspec, or test data)	9m 36s
	3h 13m 5s

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