Update README.md

projects/README.md

@@ -4,5 +4,5 @@
 
 - [llama_index_rag](./llama_index_rag/README.md): Build a lightweight RAG system based on llama_index
 - [gradio_app](./gradio_app/README.md): Build a web app based on gradio
-- [web_demo](./web_demo/README.md): MinerU online[demo](https://opendatalab.com/OpenSourceTools/Extractor/PDF/)localized deployment version
+- [web_demo](./web_demo/README.md): MinerU online [demo](https://opendatalab.com/OpenSourceTools/Extractor/PDF/) localized deployment version