Update index.tsx

test the wrong ui name

Author: manojown

ui/src/pages/Home/index.tsx

@@ -861,8 +861,8 @@ export default function CallToActionWithIllustration() {
           </Text>
           <Stack spacing={6} direction="row">
             <RouterLink to="signin">
-              <Button rounded="full" px={6} color="yellow">
-                Login
+              <Button rounded="full" px={6} colorScheme="primary">
+                ui
               </Button>
             </RouterLink>
             <RouterLink to="signup">