Update templates/intro.html

templates/intro.html

@@ -90,7 +90,7 @@
                                     <a href="https://rapidapi.com/faceonlive-inc-faceonlive-inc-default/api/face-liveness-detection3/" target="_blank" rel="noopener noreferrer">Face Liveness Detection</a><br/>
                                     <a href="https://rapidapi.com/faceonlive-inc-faceonlive-inc-default/api/face-recognition26/" target="_blank" rel="noopener noreferrer">Face Recognition</a>
                                 </li>
-                                <li>Set X-RapidAPI-Key as enrironment variable named API_KEY.</li>
+                                <li>Set X-RapidAPI-Key as environment variable named API_KEY.</li>
                                 <li>Install python packages from requirements.txt and run "python app.py".</li>
                             </ol>
                             <br/>