Fixing the link in conclusion lesson and making it more understandable

Author: gulcingulletutan

_episodes/05-conclusions.md

@@ -75,7 +75,7 @@ The ESMValTool [Discussions page](https://github.com/ESMValGroup/ESMValTool/disc
 is a good place to find information on general issues, or check if your question has already been addressed.
 If you have a GitHub account, you can also post your questions there.
 
-If you encounter difficulties, a great starting point is to visit issues page [issue page](https://github.com/ESMValGroup/ESMValTool/issues) to check whether your issues have been created or not. If they have been created before, suggestions provided by developers can help you to solve the issues you encountered.
+If you encounter difficulties, a great starting point is to visit issues page [issue page](https://github.com/ESMValGroup/ESMValTool/issues) to check whether your issues have already been reported or not. If they have been reported before, suggestions provided by developers can help you to solve the issues you encountered.
 Note that you will need a GitHub account for this.
 
 Additionally, there is an ESMValTool email list.