Update README.md

Author: catalyst17

README.md

@@ -384,7 +384,7 @@ failureRecoverer:
 
 #### Storage
 This application has 3 kinds of storage: `main`, `staging` and `orchestrator`.
-Each of them takes similar configuration, sligtly depending on the driver you want to use.
+Each of them takes similar configuration, slightly depending on the driver you want to use.
 There are no defaults, so this needs to be configured.
 
 For example, this can be a part of `config.yml`: