fix linter error

Author: SarahAlidoost

CODE_OF_CONDUCT.md

@@ -1,5 +1,5 @@
 # Contributor Code of Conduct
 
 As contributors and maintainers of this tutorial,
-we pledge to follow the
-[ESMValTool Code of Conduct](https://github.com/ESMValGroup/ESMValTool/blob/master/CODE_OF_CONDUCT.md).
+we pledge to follow the ESMValTool
+[Code of Conduct](https://github.com/ESMValGroup/ESMValTool/blob/master/CODE_OF_CONDUCT.md).