Update version of package.json and link of pattern-lab

[truls1502]

I just wanted to inform that the version might not look correct one for v.10.6.1: https://github.com/phase2/particle/blob/v10.6.1/package.json#L3

And I was unable to click on the Patternlab on top to left, it redirected to /, maybe it should be linked to welcome-page?