change update.md file

UPDATE.md

@@ -1,7 +1,7 @@
 #How to update your Thelia
 
-- copy all files from the thelia new version (local/modules/* files too)
 - clear all caches running ```php Thelia cache:clear```
+- copy all files from the thelia new version (local/modules/* files too)
 - run ```php Thelia thelia:update```
 - again clear all caches in all environment :
     - ```php Thelia cache:clear```