Increase version to v9.5.0

Author: rgaiacs

_includes/lesson_footer.html

@@ -45,7 +45,7 @@
   <div class="row">
     <div class="col-md-12" align="center">
       Using <a href="https://github.com/swcarpentry/styles/">The Carpentries style</a> 
-      version <a href="https://github.com/swcarpentry/styles/releases/tag/v9.4.0">9.4.0</a>.
+      version <a href="https://github.com/swcarpentry/styles/releases/tag/v9.5.0">9.5.0</a>.
     </div>
   </div>
 </footer>