Add disclaimer text on the bottom

src/Components/IsNiftyOpenApp/App.css

@@ -107,3 +107,16 @@
   width: 100%;
   transform: translate(-50%, 0);
 }
+
+.disclaimer {
+  position: absolute;
+  bottom: 0;
+  left: 0;
+  right: 0;
+  margin: 0 1em;
+  padding: 0.5em;
+  font-size: .6em;
+  background-color: rgba(255,255,255,0.75);
+  border-radius: .5em;
+  text-align: center;
+}

src/Components/IsNiftyOpenApp/App.tsx

@@ -115,6 +115,11 @@ class IsNiftyOpenApp extends React.Component {
             />
           </div>
         </div>
+        <div className="disclaimer">
+          {`This data is taken from Karanataka ETV Flipkart holidays list,
+            but doesn't include optional holidays.
+            There is no gurantee that this data is correct or will be kept updated.`}
+        </div>
       </div>
     );
   }