doc: Address review comments for contributor index
doc: Address review comments for contributor index

Per comments in If5e7940ddd0ae3316f7475742c02abfe3df28ac4.

Part of bp: doc-migration

Change-Id: Ide8921b0d891a65212bc2173e0113f4ce00f50b0

mikalstill/nova,klmitch/nova,gooddata/openstack-nova,mahak/nova,mikalstill/nova,mahak/nova,openstack/nova,gooddata/openstack-nova,mahak/nova,klmitch/nova,mikalstill/nova,rahulunair/nova,openstack/nova,klmitch/nova,gooddata/openstack-nova,phenoxim/nova,rahulunair/nova,openstack/nova,phenoxim/nova,klmitch/nova,rahulunair/nova,gooddata/openstack-nova