fix broken link to mongodb sample app[#110529278]

Author: bentarnoff

examples.html.md.erb

@@ -14,7 +14,7 @@ The following example service broker applications have been developed - these ar
 
 ## Java
 
-* [Spring Cloud - Cloud Foundry Service Broker](https://github.com/spring-cloud/spring-cloud-cloudfoundry-service-broker) - This implements the REST contract for service brokers and the artifacts are published to the spring maven repo.  This greatly simplifies development: include a single dependency in Gradle, implement interfaces, and configure. A sample implementation has been provided for [MongoDB](https://github.com/spring-cloud-samples/cloudfoundry-mongodb-service-broker).
+* [Spring Cloud - Cloud Foundry Service Broker](https://github.com/spring-cloud/spring-cloud-cloudfoundry-service-broker) - This implements the REST contract for service brokers and the artifacts are published to the spring maven repo.  This greatly simplifies development: include a single dependency in Gradle, implement interfaces, and configure. A sample implementation has been provided for [MongoDB](https://github.com/spring-cloud-samples/cloudfoundry-service-broker).
 * [MySQL Java Broker](https://github.com/cloudfoundry-community/cf-mysql-java-broker) - a Java port of the Ruby-based [MySQL broker](https://github.com/cloudfoundry/cf-mysql-broker) above.
 
 ## Go