Update HandlerMappingIntrospector Usage in CORS support #202

Job	Run time
Check Samples	0s
Check for Package Tangles	0s
Build (ubuntu-latest, 17) / Build	13m 40s
Build (windows-latest, 17) / Build	13m 54s
Test Against Snapshots (17, 17) / Test	10m 2s
Test Against Snapshots (21-ea, 21) / Test	10m 27s
Deploy Schema	0s
Deploy Docs	0s
Deploy Artifacts	0s
Perform Release	0s
Send Notification	0s
	48m 3s

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