[trtllm] Update release_images_inference.yml to remove rc1 from RensorRT Version (#4961)

Author: ksuma2109

release_images_inference.yml

@@ -191,7 +191,7 @@ release_images:
       device_types: [ "gpu" ]
       python_versions: [ "py312" ]
       os_version: "ubuntu24.04"
-      tensorrtllm_version: "0.21.0rc1"
+      tensorrtllm_version: "0.21.0"
       cuda_version: "cu128"
       example: False
       disable_sm_tag: True