update release version

Author: tomkralidis

workshop/content/docs/index.md

@@ -4,7 +4,7 @@ title: Diving into pygeoapi
 
 # Welcome to the Diving into pygeoapi workshop!
 
-Version: 1.4.0
+Version: 1.5.0
 
 ![pygeoapi logo](assets/images/pygeoapi-logo.png)