Add description to studies index endpoint.
Add description to studies index endpoint.

dmlond/aact,ctti-clinicaltrials/aact,SturdyCo/aact2,ctti-clinicaltrials/aact,1Maria/aact,SturdyCo/aact2,tibbs001/aact-1,ctti-clinicaltrials/aact,1Maria/aact,dmlond/aact,dmlond/aact,1Maria/aact,SturdyCo/aact2,tibbs001/aact-1,tibbs001/aact-1,SturdyCo/aact2,1Maria/aact,dmlond/aact