docs: fix grammar

README.md

@@ -6,7 +6,7 @@
  [![Code Climate](https://codeclimate.com/github/pact-foundation/pact_broker/badges/gpa.svg)](https://codeclimate.com/github/pact-foundation/pact_broker)
  [![Test Coverage](https://codeclimate.com/github/pact-foundation/pact_broker/badges/coverage.svg)](https://codeclimate.com/github/pact-foundation/pact_broker/coverage)
 
-The Pact Broker is an application for sharing for consumer driven contracts and verification results. It is optimised for use with "pacts" (contracts created by the [Pact][pact-docs] framework), but can be used for any type of contract that can be serialized to JSON.
+The Pact Broker is an application for sharing of consumer driven contracts and verification results. It is optimised for use with "pacts" (contracts created by the [Pact][pact-docs] framework), but can be used for any type of contract that can be serialized to JSON.
 
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 <a href="https:/pactflow.io/?utm_source=github&utm_campaign=pact_broker_intro"><img src="docs/images/Pactflow logo - black small.png"></a>