Bump version in index.html file.

Author: KelSolaar

index.html

@@ -76,7 +76,7 @@ <h1>Colour Science Precis for the CGI Artist</h1>
     </div>
 </div>
 
-<p style="text-align: center;">v1.0 - <a
+<p style="text-align: center;">v1.1 - <a
         href="https://www.colour-science.org">colour-science.org</a>
     - April 2024 - CC BY-SA 4.0 - <a
             href="https://github.com/colour-science/colour-science-precis">Github</a>