[7.8] [DOCS] Add release notes for 7.7.1 (#57566)#57595

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jrodewig merged 1 commit intoelastic:7.8from jrodewig:backport__57566-78

Jun 3, 2020

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Commits on Jun 3, 2020

[DOCS] Add release notes for 7.7.1 (#57566 )

williamrandolph
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jrodewig
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