made NeuroTune name display consistent throughout

index.html

@@ -20,7 +20,7 @@
                     <a class="nav-link" href="index.html">Home <span class="sr-only">(current)</span></a>
                 </li>
                 <li class="nav-item">
-                    <a class="nav-link" href="#" data-toggle="modal" data-target="#infoModal">What is NeuroTune? </a>
+                    <a class="nav-link" href="#" data-toggle="modal" data-target="#infoModal">What is NeuroTune<sup>tm</sup>? </a>
                 </li>
             </ul>
         </div>
@@ -30,7 +30,7 @@
         <h1 class="text-center">NeuroTune<sup>tm</sup> 🎧</h1>
         <div class="row justify-content-center">
             <div class="col-md-6">
-                <p>NeuroTune is a free Auditory Processing Trainer! Just select your prefered audio file from your own
+                <p>NeuroTune<sup>tm</sup> is a free Auditory Processing Trainer! Just select your prefered audio file from your own
                     device - we recommend
                     calming, stimulating classical music, but it's your choice! Headphones required for optimal
                     experience. <a href="about.html">Learn more</a>.</p>
@@ -116,19 +116,19 @@ <h5 class="card-title">Dynamic Settings</h5>
         <div class="modal-dialog modal-lg" role="document">
             <div class="modal-content">
                 <div class="modal-header">
-                    <h2 class="modal-title" id="infoModalLabel">What is NeuroTune?</h2>
+                    <h2 class="modal-title" id="infoModalLabel">What is NeuroTune<sup>tm</sup>?</h2>
                     <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                         <span aria-hidden="true">&times;</span>
                     </button>
                 </div>
                 <div class="modal-body" style="overflow-y: auto;">
-                    <p>NeuroTune is a free Auditory Processing Trainer! Just select your prefered audio file from your
+                    <p>NeuroTune<sup>tm</sup> is a free Auditory Processing Trainer! Just select your prefered audio file from your
                         own device -
                         we recommend calming, stimulating classical music, but it's your choice! Headphones required for
                         optimal
                         experience.
 
-                        NeuroTune trains your auditory system by dynamically modifying the audio in ways that stimulate
+                        NeuroTune<sup>tm</sup> trains your auditory system by dynamically modifying the audio in ways that stimulate
                         interhemispheric communication, and 'surprise' the auditory system, since these shifts are
                         dynamic and
                         unpredictable. Frequencies in the human vocal range are emphasised, while 'noisy' ones are