Add release note for fix for broken plugin installs in 6.2.2

Fixes elastic#9170

Release v6.2.2

Release v5.6.8

Fix overview list and add ID

Fixes elastic#9156

Add link to keystore plus light edit

Fixes elastic#9103

updated docs state

Fixes elastic#9087

[DOCS] Fixed broken link to monitoring info (elastic#9039)

Bump lockfile for 5.6.7

Fixes elastic#9009

Release v6.1.2

Release v5.6.6