* [docs] Voyager docs for v1.8.8

* add fixed in for postgres known issues

* use shortcode

* Apply suggestions from  review

Co-authored-by: Dwight Hodge <79169168+ddhodge@users.noreply.github.com>

* review comments

* review comment and fixes

* minor fixes

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Co-authored-by: Dwight Hodge <79169168+ddhodge@users.noreply.github.com>
Co-authored-by: Dwight Hodge <ghodge@yugabyte.com>