Update versions.yml for 9.1.3

This PR updates the versions config file changing versioning_systems.stack.current to the minor version about to be released.

Author: alexandra5000

config/versions.yml

@@ -3,7 +3,7 @@ versioning_systems:
   # Updates for Stack versions are manual
   stack: &stack
     base: 9.0
-    current: 9.1.2
+    current: 9.1.3
 
   # Using an unlikely high version
   # So that our logic that would display "planned" doesn't trigger