Update README.md

Author: scraly

README.md

@@ -13,8 +13,13 @@ Inspect what is currently in the TF state (useful after an apply)
 $ terraform show
 ```
 
-
 Set the log to DEBUG level and save the log in an output external file
 ```
 $ TF_LOG_PATH=mylogfile.txt TF_LOG=debug terraform apply
 ```
+
+Refresh information. Compare the current real remote information and put it in the TF state
+
+```
+$ terraform refresh
+```