Update index.html

index.html

@@ -46,7 +46,7 @@ <h1 class="govuk-heading-l">Library finder instructions</h1>
 
     <p class="govuk-body" id="main-content">
       A widget is a small component that can be placed on any website. This widget helps users find their nearest public
-      library.
+      library. The data is provided by the <a class="govuk-link" href="https://www.libraryon.org" target="_blank">LibraryOn API</a>.
     </p>
     <p class="govuk-body">
       You can either embed the widget as it comes, or customise the width, height, and primary/secondary colours. Once
@@ -286,4 +286,4 @@ <h1 class="govuk-heading-l">Code</h1>
 
 </body>
 
-</html>
+</html>