Update README.md (#21870)

removed preview flag

Author: mahipdeora25

nvidia_nim/README.md

@@ -8,10 +8,6 @@ This check monitors [NVIDIA NIM][1] through the Datadog Agent.
 
 ## Setup
 
-<div class="alert alert-warning">
-This integration is currently in Preview. Its availability is subject to change in the future. 
-</div>
-
 Follow the instructions below to install and configure this check for an Agent running on a host. For containerized environments, see the [Autodiscovery Integration Templates][3] for guidance on applying these instructions.
 
 **Requirements**: