Fix DC/OS release version (#2197)

Author: jonas

examples/dcos-releases/README.md

@@ -8,6 +8,6 @@ Here are the release channels acs-engine is able to deploy:
 
 1. DC/OS `1.8`.  Access by specifying `"orchestratorVersion": "1.8.8"`.
 2. DC/OS `1.9`.  Access by specifying `"orchestratorVersion": "1.9.0"`.
-3. DC/OS `1.9`.  Access by specifying `"orchestratorVersion": "1.10.0"`.
+3. DC/OS `1.10`.  Access by specifying `"orchestratorVersion": "1.10.0"`.
 
 Deploying and using [DC/OS](../../docs/dcos.md)