update python versions in ci #347

Job	Run time
gwcs unit tests	54s
jwst unit tests	27m 49s
roman_datamodels unit tests	1m 20s
specutils unit tests	1m 20s
weldx unit tests	2m 21s
sunpy unit tests	1m 51s
dkist unit tests	2m 57s
asdf-astropy unit tests	2m 2s
asdf unit tests	1m 2s
asdf-transform-schemas unit tests	51s
asdf-wcs-schemas unit tests	58s
asdf-coordinates-schemas unit tests	1m 35s
	45m 0s

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