Update continuous onboarding link destinations

Currently, the continuous onboarding experience is not correctly link the onboarding actions to the right onboarding issues related to that content.

For example, in the net new free signup, I can see that "invite your colleagues" is linked to issue # 8.

When I select that link and view issue # 8 it's actually the issue for "what's in paid vs free".

The correct issue link formatting is as follows

CTA text	Link destination
Invite your colleagues	*/learn-gitlab/-/issues/7
Create or import a repository	*/learn-gitlab/-/issues/2
Set up CI/CD	*/learn-gitlab/-/issues/4
Start a free Ultimate trial	*/learn-gitlab/-/issues/13
Add code owners - trial only	*/learn-gitlab/-/issues/2
Add merge request approval - trial only	cell
Create an issue	*/learn-gitlab/-/issues/3
Submit a merge request	*/learn-gitlab/-/issues/5
Run a Security scan using CI/CD	*/learn-gitlab/-/issues/4