update test snapshot

Author: emallson

frontend/src/components/__snapshots__/Lead.test.js.snap

@@ -14,7 +14,7 @@ exports[`Lead matches the snapshot 1`] = `
       <dl class="row">
         <dt class="col-sm-3 text-right">Jurisdiction</dt>
         <dd class="col-sm-9">Federal Agency - Executive</dd>
-        <dt class="col-sm-3 text-right">Agency</dt>
+        <dt class="col-sm-3 text-right">Source</dt>
         <dd class="col-sm-9">Department of Health and Human Services</dd>
         <dt class="col-sm-3 text-right">Main Topics</dt>
         <dd class="col-sm-9">Health</dd>