Merge pull request #117 from ESMValGroup/update_lifcycle

replace alpha with beta

Author: Peter9192

_config.yml

@@ -16,7 +16,7 @@ title: "ESMValTool Tutorial"
 
 # Life cycle stage of the lesson
 # possible values: "pre-alpha", "alpha", "beta", "stable"
-life_cycle: "alpha"
+life_cycle: "beta"
 
 #------------------------------------------------------------
 # Generic settings (should not need to change).