Bug: Twitter share link opens popup with @poshog instead of @posthog

[DavidODonovan]

Docs pages: for every article there is a share menu on the right hand side underneath the article author names. If you click on share to Twitter the dialog box that opens is prepopulated with @poshog message instead of @PostHog. I've just spent 10mins looking through the repo but it's a maze in there so somebody else more familiar with the codebase should fix it.

[joethreepwood]

Thanks!

Think that this should solve it: #4675