Fix typo

Co-authored-by: Ruby Iris Juric <[email protected]>

Author: saltedlolly

source/_includes/hardware-platforms.html

@@ -164,7 +164,7 @@
             <td>Polycarbonate</td>
             <td>Gorilla Glass<br /><em>(curved)</em></td>
             <td colspan="2">Gorilla Glass<br /><em>(flat)</em></td>
-            <td colspan="2">Hardenend Glass<br /><em>(flat)</em></td>
+            <td colspan="2">Hardened Glass<br /><em>(flat)</em></td>
         </tr>
         <tr>
             <td>Charging Port</td>