[Misc] Fix examples openai_pooling_client.py (#24853)

Signed-off-by: wang.yuqi <noooop@126.com>
Co-authored-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

examples/online_serving/pooling/README.md

@@ -0,0 +1,43 @@
+# Pooling models
+
+## Cohere rerank usage
+
+```bash
+python examples/online_serving/pooling/cohere_rerank_client.py
+```
+
+## Jinaai rerank usage
+
+```bash
+python examples/online_serving/pooling/jinaai_rerank_client.py
+```
+
+## Openai chat embedding for multimodal usage
+
+```bash
+python examples/online_serving/pooling/openai_chat_embedding_client_for_multimodal.py
+```
+
+## Openai classification usage
+
+```bash
+python examples/online_serving/pooling/openai_classification_client.py
+```
+
+## Openai embedding usage
+
+```bash
+python examples/online_serving/pooling/openai_embedding_client.py
+```
+
+## Openai embedding matryoshka dimensions usage
+
+```bash
+python examples/online_serving/pooling/openai_embedding_matryoshka_fy.py
+```
+
+## Openai pooling usage
+
+```bash
+python examples/online_serving/pooling/openai_pooling_client.py
+```