Updated the Dockerfile pathf or rerank

ChatQnA/docker_compose/intel/cpu/xeon/README_pinecone.md

@@ -82,7 +82,7 @@ docker build --no-cache -t opea/retriever-pinecone:latest --build-arg https_prox
 ### 3. Build Rerank Image
 
 ```bash
-docker build --no-cache -t opea/reranking-tei:latest --build-arg https_proxy=$https_proxy --build-arg http_proxy=$http_proxy -f comps/reranks/tei/langchain/Dockerfile .
+docker build --no-cache -t opea/reranking-tei:latest --build-arg https_proxy=$https_proxy --build-arg http_proxy=$http_proxy -f comps/reranks/tei/Dockerfile .
 ```
 
 ### 4. Build LLM Image