[7.x] [DOCS] Changes links in stack getting started to point to the Observability guide (#1422)#1423

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szabosteve merged 1 commit intoelastic:7.xfrom szabosteve:backport/7.x/pr-1422

Oct 20, 2020

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Commits on Oct 20, 2020

[DOCS] Changes links in stack getting started to point to the Observability guide (elastic#1422 )

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