Merge branch 'adjust-handbook-onboarding-101-link' into 'master'

Adjust "Onboarding 101" link for onboarding issue

See merge request !4488

source/handbook/general-onboarding/index.html.md

@@ -86,7 +86,7 @@ The topics are ordered by priority in which they need to be tackled, and the mai
     > please let me know if that is not the case.
     >
     > Everything you need to get started is listed in your onboarding issue:
-    > [Insert link]. Check out [Onboarding 101](/handbook/general-onboarding/onboarding-101) for everything you need to know throughout the onboarding process. You might have received invitations to create accounts for Slack, BambooHR, and other tools. Before you do this, make sure you've set up a 1Password account as instructed in your onboarding issue first. This will save you a lot of time later!
+    > [Insert link]. Check out [Onboarding 101](https://about.gitlab.com/handbook/general-onboarding/onboarding-101) for everything you need to know throughout the onboarding process. You might have received invitations to create accounts for Slack, BambooHR, and other tools. Before you do this, make sure you've set up a 1Password account as instructed in your onboarding issue first. This will save you a lot of time later!
     >
     > We're looking forward to seeing you on our daily Team Call! The first time
     > that you join, please make sure that you connect at least 10 minutes