Merge pull request #3 from mojaloop/mdebarros-patch-1

Fixed to readme

README.md

@@ -5,4 +5,4 @@ Common shared Logging lib for Mojaloop components
 
 Set the following environmental variable `LOG_LEVEL` to the desired log level (i.e. `info`, `debug` etc.)
 
-_Note: This mus lower-case._
+_Note: This must be lower-case._