fix(deps): update dependency llama_stack_client to v0.2.21 (opendatahub-io#615)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

pyproject.toml

@@ -69,7 +69,7 @@ dependencies = [
     "marshmallow==3.26.1,<4", # this version is needed for pytest-jira
     "pytest-html>=4.1.1",
     "fire",
-    "llama_stack_client==0.2.20",
+    "llama_stack_client==0.2.21",
     "pytest-xdist==3.8.0",
 ]