Fix link case sensitivity and update license links in index.html

Author: nikoscham

finiteElementMethodNotes.html FiniteElementMethodNotes.htmlfiniteElementMethodNotes.html renamed to FiniteElementMethodNotes.html

@@ -118,7 +118,7 @@ <h3>Theory Notes</h3>
     </p>
     <ul>
       <li>
-        <a href="https://feascript.com/finiteElementMethodNotes.html" target="_blank"
+        <a href="https://feascript.com/FiniteElementMethodNotes.html" target="_blank"
           >Finite element method notes</a
         >
       </li>
@@ -149,9 +149,9 @@ <h3>Tutorials</h3>
     <h2 id="licensing"><a name="Licensing"></a>Licensing</h2>
     <p>
       FEAScript is distributed under the terms of the
-      <a href="https://github.com/FEAScript/FEAScript/blob/main/LICENSE" target="_blank">MIT license</a>. This
-      website is licensed under a
-      <a href="https://github.com/FEAScript/FEAScript-website/blob/main/LICENSE" target="_blank"
+      <a href="https://opensource.org/license/mit" target="_blank">MIT license</a>. This website is licensed
+      under a
+      <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank"
         >Creative Commons Attribution 4.0 license</a
       >.
     </p>