add reranker to readme

README.md

@@ -176,7 +176,7 @@ You can refer to ```search_r1/search/retriever_server.py``` for an example of la
 - Support local sparse retrievers (e.g., BM25). ✔️
 - Support local dense retrievers (both flat indexing and ANN indexing) ✔️
 - Support google search / bing search / brave search API and others. ✔️
-- Support off-the-shelf neural rerankers.
+- Support off-the-shelf neural rerankers. ✔️
 - Support different RL methods (e.g., PPO, GRPO, reinforce). ✔️
 - Support different LLMs (e.g., llama3, Qwen2.5, etc). ✔️
 

docs/retriever.md

@@ -22,6 +22,7 @@ For local retrievers, we use [wiki-18](https://huggingface.co/datasets/PeterJinG
 
 - If you have a domain specific online search engine (e.g., PubMed search), you can refer to [link](https://github.com/PeterGriffinJin/Search-R1/blob/main/search_r1/search/serp_search_server.py) to integrate it to Search-R1 by yourself.
 
+Search engine launching scripts can be found at [link](https://github.com/PeterGriffinJin/Search-R1/tree/main/example/retriever).
 
 ### Local Sparse Retriever