fix(SkeletonTableHead): prevent nested th elements when passing Th co… #645

Job	Run time
call-build-lint-test-workflow / build	28s
call-build-lint-test-workflow / test_jest	1m 6s
call-build-lint-test-workflow / lint	18s
call-build-lint-test-workflow / test_a11y	1m 30s
call-build-lint-test-workflow / test_cypress	1m 16s
deploy	50s
	5m 28s

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