Update index

cards.md

@@ -92,7 +92,7 @@ order: -1
 			<li><a href="{{ 'external/integrity/encryption/file' | relative_url }}">Encrypting Files and Folders</a></li>
 			<li><a href="{{ 'external/integrity/naming' | relative_url }}">Naming files</a></li>
 			<li><a href="{{ 'external/integrity/organization' | relative_url }}">Organization</a></li>
-			<li><a href="{{ 'external/integrity/presentation' | relative_url }}">How to use the LCSB PowerPoint template</a></li>
+			<li><a href="{{ 'external/integrity/sanitisation' | relative_url }}">Sanitising Data Files</a></li>
 			<li><a href="{{ 'external/integrity/spreadsheets' | relative_url }}">Working with spreadsheets</a></li>
 
 		</ul>