Docs: Links to optional packages not working

[mattbal]

All the links to optional packages are broken. They just redirect to https://atlassian.design/components/pragmatic-drag-and-drop/about

[mattbal]

Using the sidebar nav menu let's you visit the optional package pages. Looks like the links just need to be updated

[alexreardon]

I'll update these asap

[michaelabrahamian]

These have been fixed ✅