[PR #10706/db6faf75 backport][3.11] docs/client_reference.rst, attribute name from trace_config to trace_… (#10707)

Co-authored-by: alegtk <[email protected]>

Author: patchback[bot]

docs/client_reference.rst

@@ -364,7 +364,7 @@ The client session supports the context manager protocol for self closing.
 
       .. versionadded:: 3.7
 
-   .. attribute:: trace_config
+   .. attribute:: trace_configs
 
       A list of :class:`TraceConfig` instances used for client
       tracing.  ``None`` (default) is used for request tracing