Update index.html

Author: Vanish-Coder

index.html

@@ -120,7 +120,7 @@
 <div id="licenseOverlay">
   <div id="licensePopup">
     <p>
-      This site is under an MIT License. No personal data is collected and cookies are sparingly used, only when necessary. Obviously, any cookie-related features won't be available in the offline version. The source code is open source and you can view it here:
+      This site is under an MIT License. No personal data is collected and cookies are sparingly used, only when necessary (such as for rerembering user choices, never for tracking or analytics). Obviously, any cookie-related features won't be available in the offline version. The source code is open source and you can view it here:
       <br><br>
       <a href="https://github.com/Vanish-Coder/unit-circle-practice" target="_blank">
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