fix items in asdf-1.1.0 schema #383

Job	Run time
gwcs unit tests	46s
jwst unit tests	23m 30s
roman_datamodels unit tests	1m 20s
specutils unit tests	1m 28s
weldx unit tests	2m 14s
sunpy unit tests	2m 17s
dkist unit tests	2m 30s
asdf-astropy unit tests	2m 0s
asdf unit tests	1m 7s
asdf-transform-schemas unit tests	1m 7s
asdf-wcs-schemas unit tests	1m 9s
asdf-coordinates-schemas unit tests	2m 28s
	41m 56s

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