Update Chat.module.css

Author: Roopan-Microsoft

ClientAdvisor/App/frontend/src/pages/chat/Chat.module.css

@@ -35,7 +35,7 @@ html, body {
     0px 0px 2px rgba(0, 0, 0, 0.12);
   border-radius: 8px;
   overflow-y: auto;
-  max-height: calc(100vh - 300px);
+  max-height: calc(100vh - 240px);
   height: 100vh;
   width: 100%;
 }