Update README.md (#238)

Implementing change from #236

README.md

@@ -247,7 +247,7 @@ celebrate validates request values in the following order:
 
 If you use any of joi's updating validation APIs (`default`, `rename`, etc.) `celebrate` will override the source value with the changes applied by joi (assuming the request is valid).
 
-For example, if you validate `req.query` and have a `default` value in your joi schema, if the incoming `req.query` is missing a value for default, during validation `celebrate` will overrite the original `req.query` with the result of `joi.validate`. This is done so that once `req` has been validated, you can be sure all the inputs are valid and ready to consume in your handler functions and you don't need to re-write all your handlers to look for the query values in `res.locals.*`.
+For example, if you validate `req.query` and have a `default` value in your joi schema, if the incoming `req.query` is missing a value for default, during validation `celebrate` will overwrite the original `req.query` with the result of `joi.validate`. This is done so that once `req` has been validated, you can be sure all the inputs are valid and ready to consume in your handler functions and you don't need to re-write all your handlers to look for the query values in `res.locals.*`.
 
 ### Additional Info