[WSO2-Release] [Release 5.1.7] update documentation for release 5.1.7

Author: wso2-jenkins-bot

README.md

@@ -40,7 +40,7 @@ For more information on using Siddhi refer <a target="_blank" href="https://sidd
 
 ## Latest API Docs 
 
-Latest API Docs is <a target="_blank" href="https://siddhi-io.github.io/siddhi/api/5.1.6">5.1.6</a>.
+Latest API Docs is <a target="_blank" href="https://siddhi-io.github.io/siddhi/api/5.1.7">5.1.7</a>.
 
 ## Support and Contribution