Update broken link in README.md (#558)

Reranking search with cross-encoders link was incorrect.

README.md

@@ -40,7 +40,7 @@ Most code examples are written in Python, though the concepts can be applied in
   - [Visualizing embeddings in 2D](examples/Visualizing_embeddings_in_2D.ipynb) or [3D](examples/Visualizing_embeddings_in_3D.ipynb)
   - [Embedding long texts](examples/Embedding_long_inputs.ipynb)
   - [Embeddings playground (streamlit app)](apps/embeddings-playground/README.md)
-  - [Reranking search results using cross-encoders](examples/Reranking_search_results_with_cross-encoders.ipynb)
+  - [Search reranking with cross-encoders](examples/Search_reranking_with_cross-encoders.ipynb)
 - Apps
   - [File Q&A](apps/file-q-and-a/)
   - [Web Crawl Q&A](apps/web-crawl-q-and-a)