Fix readme links (again) (#153)

README.md

@@ -42,9 +42,9 @@ RAGatouille makes it as simple as can be to use ColBERT! We want the library to
 
 In this section, we'll quickly walk you through the three core aspects of RAGatouille:
 
-- [🚀 Training and Fine-Tuning ColBERT models](#training-and-fine-tuning)
+- [🚀 Training and Fine-Tuning ColBERT models](#-training-and-fine-tuning)
 - [🗄️ Embedding and Indexing Documents](#%EF%B8%8F-indexing)
-- [🔎 Retrieving documents](#retrieving-documents)
+- [🔎 Retrieving documents](#-retrieving-documents)
 
 ➡️ If you want just want to see fully functional code examples, head over to the [examples](https://github.com/bclavie/RAGatouille/tree/main/examples)⬅️