Fix "Overview" to link to `index.html` rather than `/`
Fix "Overview" to link to `index.html` rather than `/`

openstack/stackviz,timothyb89/stackviz,openstack/stackviz,timothyb89/stackviz-ng,dklyle/stackviz-ng,openstack/stackviz,timothyb89/stackviz-ng,dklyle/stackviz-ng,timothyb89/stackviz,timothyb89/stackviz-ng,timothyb89/stackviz