Fix typo

Author: fabpot

README.md

@@ -3,7 +3,7 @@ Symfony Translation Contracts
 
 A set of abstractions extracted out of the Symfony components.
 
-Can be used to build on semantics that the Symfony components proved useful - and
+Can be used to build on semantics that the Symfony components proved useful and
 that already have battle tested implementations.
 
 See https://github.com/symfony/contracts/blob/main/README.md for more information.