Fix: spelling

index.html

@@ -46,7 +46,7 @@ <h3 style="margin-left: 5px;"><a href="#credit">Credit</a></h3>
         <div style="grid-column: auto;grid-row: auto;">
             <div style="padding-bottom: 5px;padding-right: 5px;background-color: 404064;"><div style="padding-top: 5px;padding-left: 5px;background-color: ACACC0;">
                 <div style="background-color: 646488;padding: 15px;height: 97%;">
-                    <h2 id="introduction">Introdution</h2>
+                    <h2 id="introduction">Introduction</h2>
                     <p>The Standardised Expanded Track Set or SETS for short is a fork of <a href="https://github.com/StarRaid/Standardised-UK-Track-Set">SUKTS</a>, the Standardised UK Track Set. The main difference between SUKTS and SETS is that SETS has support for multible voltages of electrified track. Due to the large selection of tracks avaliable in SETS it has been split up to into multible independent NewGRF files, you can read more about each of them below.</p>
                     <p>All the tracks of both Newgrfs can not be enabled at once!!! it may therefore be worth considering what tracks you will actually need. This is due to the OpenTTD game limitation of 64 railtypes.</p>
                     <h2 id="features">Features:</h2>