Fix indentation in Ubuntu install doc
Fix indentation in Ubuntu install doc

Metaswitch/calico,matthewdupre/felix,anortef/calico,neiljerram/felix,beddari/calico,ocadotechnology/calico,beddari/calico,Metaswitch/calico,matthewdupre/felix,alexhersh/calico,TrimBiggs/calico,anortef/calico,neiljerram/felix,kasisnu/calico,TrimBiggs/calico,kasisnu/calico,alexhersh/calico,neiljerram/felix,ocadotechnology/calico,neiljerram/felix