Correct capitalization in tutorial section headings for consistency

Author: nikoscham

index.html

@@ -165,7 +165,7 @@ <h2 id="gettingstarted"><a name="Getting Started"></a>Getting Started</h2>
         Node.js for server-side applications, or with online interactive notebooks.
       </li>
       <li>
-        <strong>Visual Editor (FEAScript platform):</strong> The
+        <strong>Visual Editor (FEAScript Platform):</strong> The
         <a href="https://platform.feascript.com">FEAScript platform</a>
         provides a no-code, block-based interface (based on
         <a href="https://developers.google.com/blockly/">
@@ -417,13 +417,13 @@ <h2 id="tutorials"><a name="Tutorials"></a>Tutorials</h2>
     </p>
     <ul>
       <li>
-        <strong>Heat conduction through a wall</strong>:
+        <strong>Heat Conduction Through a Wall</strong>:
         <a href="https://feascript.com/tutorials/HeatConduction1DWall.html">API (browser-based)</a>
         |
         <a href="https://feascript.com/tutorials/HeatConduction1DWallPlatform.html">FEAScript platform</a>
       </li>
       <li>
-        <strong>Heat conduction in a two-dimensional fin</strong>:
+        <strong>Heat Conduction in a Two-Dimensional Fin</strong>:
         <a href="https://feascript.com/tutorials/HeatConduction2DFin.html">API (browser-based)</a>
         |
         <a href="https://feascript.com/tutorials/HeatConduction2DFinWorker.html"
@@ -437,7 +437,7 @@ <h2 id="tutorials"><a name="Tutorials"></a>Tutorials</h2>
         <a href="https://feascript.com/tutorials/HeatConduction2DFinPlatform.html">FEAScript platform</a>
       </li>
       <li>
-        <strong>Solidification front propagation in a two-dimensional domain</strong>:
+        <strong>Solidification Front Propagation in a Two-Dimensional Domain</strong>:
         <a href="https://feascript.com/tutorials/SolidificationFront2D.html">API (browser-based)</a>
         |
         <a href="https://feascript.com/tutorials/SolidificationFront2DWorker.html"