Bump codecov/codecov-action from 3 to 4 #223

Job	Run time
build-all	1m 12s
tests (es, -Pelasticsearch8, es8, 8)	27m 49s
tests (es, -Pelasticsearch7, es7, 8)	26m 45s
tests (es, -Pelasticsearch6, es6, 8)	26m 44s
tests (es, -Pelasticsearch60, es60, 8)	26m 9s
tests (es, -Pjava-11, -Pelasticsearch8, es8, 11)	28m 2s
tests (es, -Pjava-11, -Pelasticsearch7, es7, 11)	27m 30s
tests (es, -Pjava-11, -Pelasticsearch6, es6, 11)	26m 39s
tests (es, -Pjava-11, -Pelasticsearch60, es60, 11)	26m 26s
	3h 37m 16s

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