Increase reference text on 1st expansion to 3 lines and 140 characters

src/khoj/interface/web/chat.html

@@ -417,6 +417,9 @@ To get started, just start typing below. You can also type / to see a list of co
             display: block;
         }
 
+        div.references {
+            padding-top: 8px;
+        }
         div.reference {
             display: grid;
             grid-template-rows: auto;