doc: fixed broken link in readme (#5337)

Author: siddhant-khisty

README.md

@@ -187,7 +187,7 @@ Devtron is built on some of the most trusted and loved technologies:
 
 ## :muscle: Trusted By
 
-Devtron is trusted by communities all across the globe. The list of organizations using Devtron can be found [here](./USERS.MD).
+Devtron is trusted by communities all across the globe. The list of organizations using Devtron can be found [here](./USERS.md).
 
 
 ## :question: FAQs & Troubleshooting