[DOCS] Updates CHANGELOG for 8.0.0 #42

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Job	Run time
tests (6.1, 3.1)	2m 5s
tests (6.1, 3.2)	2m 0s
tests (6.1, 3.3)	2m 1s
tests (7.0, 3.1)	2m 22s
tests (7.0, 3.2)	2m 6s
tests (7.0, 3.3)	2m 12s
tests (7.1, 3.1)	2m 6s
tests (7.1, 3.2)	2m 5s
tests (7.1, 3.3)	2m 4s
	19m 1s