Fixing Error in `Hds::Flyout` & `Hds::Modal` subcomponents #12731

Job	Run time
Get files changed and conditionally skip CI	10s
Tests	7m 10s
ember-lts-3.28	3m 52s
ember-lts-4.12	3m 57s
ember-beta	3m 52s
embroider-safe	1m 38s
	20m 39s

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