Update dependency @patternfly/patternfly-a11y to v5 #295

Job	Run time
call-build-lint-test-workflow / build	1m 25s
call-build-lint-test-workflow / test_jest	1m 44s
call-build-lint-test-workflow / test_a11y	2m 7s
call-build-lint-test-workflow / lint	16s
	5m 32s

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