Update known-issues.md

Author: SoniaLopezBravo

articles/iot-operations/troubleshoot/known-issues.md

@@ -104,7 +104,7 @@ To work around this issue, follow these steps:
     If you receive a message stating `Nothing to upgrade or upgrade complete`, force the upgrade by appending:
 
     ```sh
-    az iot ops upgrade ....... --release-train stable --version 1.0.15 
+    az iot ops upgrade ....... --release-train stable 
     ```
 
 ## MQTT broker issues