DOCS: small typo LIMT (Update README.md) (#866)

Author: vitaliytv

Diff for: README.md

@@ -231,7 +231,7 @@ User.find_by_email("[email protected]")
 ```sql
 -- Grab a bunch of users from shard 1
 SET SHARD TO '1';
-SELECT * FROM users LIMT 10;
+SELECT * FROM users LIMIT 10;
 
 -- Find by id
 SET SHARDING KEY TO '1234';