Updated README.md from running validation

Author: dhirupandey

README.md

@@ -81,7 +81,7 @@ await cache.remove(k1)
 We have a **public Slack channel** where you can get in touch with us to ask questions about using the Coherence CLI
 or give us feedback or suggestions about what features and improvements you would like to see. We would love
 to hear from you. To join our channel,
-please [visit this site to get an invitation](https://join.slack.com/t/oraclecoherence/shared_invite/enQtNzcxNTQwMTAzNjE4LTJkZWI5ZDkzNGEzOTllZDgwZDU3NGM2YjY5YWYwMzM3ODdkNTU2NmNmNDFhOWIxMDZlNjg2MzE3NmMxZWMxMWE).  
+please [visit this site to get an invitation](https://join.slack.com/t/oraclecoherence/shared_invite/enQtNzcxNTQwMTAzNjE4LTJkZWI5ZDkzNGEzOTllZDgwZDU3NGM2YjY5YWYwMzM3ODdkNTU2NmNmNDFhOWIxMDZlNjg2MzE3NmMxZWMxMWE).
 The invitation email will include details of how to access our Slack
 workspace.  After you are logged in, please come to `#coherence` and say, "hello!"