update hint msg at toast bar

Author: RogersPyke

docs/index.html

@@ -33,8 +33,8 @@
                 <a href="https://github.com/FlagOpen/RoboCOIN" target="_blank" rel="noopener noreferrer">github.com/FlagOpen/RoboCOIN</a>. 
                 To get started, please install the Python package with <code>pip install robocoin</code>.<br>
                 <strong>>>>>> HELP US IMPROVE ROBOCOIN! <<<<<</strong><br>
-                <strong>Before downloading datasets, please complete the short gated-access survey at</strong><br>
-                <strong><a href="https://huggingface.co/datasets/RoboCOIN/gate" target="_blank" rel="noopener noreferrer">huggingface.co/datasets/RoboCOIN/gate</a>.</strong>
+                <strong>Before downloading datasets, may you complete the short gated-access survey at</strong><br>
+                <strong><a href="https://huggingface.co/datasets/RoboCOIN/gate" target="_blank" rel="noopener noreferrer">huggingface.co/datasets/RoboCOIN/gate</a>.(optional)</strong>
                 Thank you for your support!
                 <span class="global-banner-icon" aria-hidden="true">🙏</span>
             </span>