fix(readme): remove useless parenthesis (#85) (#86)

Author: taleh007

README.md

@@ -57,4 +57,4 @@ $ java -jar build/libs/sourcerer-app.jar
 Contribution
 ============
 
-We welcome contributions to Sourcerer App by the community. Check the [Contribution guide](https://github.com/sourcerer-io/sourcerer-app/blob/master/CONTRIBUTING.md)) for more information.
+We welcome contributions to Sourcerer App by the community. Check the [Contribution guide](https://github.com/sourcerer-io/sourcerer-app/blob/master/CONTRIBUTING.md) for more information.