Fixing links to lesson reference pages. (#498)
Fixing links to lesson reference pages. (#498)

Closes #489.
ErinBecker/website,gvwilson/website,rgaiacs/swc-website,gvwilson/website,gvwilson/website,gvwilson/website,rgaiacs/swc-website,swcarpentry/website,ErinBecker/website,swcarpentry/website,k8hertweck/website,k8hertweck/website,gvwilson/website,ErinBecker/website,rgaiacs/swc-website,swcarpentry/website,k8hertweck/website,rgaiacs/swc-website,ErinBecker/website,rgaiacs/swc-website,swcarpentry/website,k8hertweck/website,k8hertweck/website,ErinBecker/website,swcarpentry/website