fix dim number

README.md

@@ -28,6 +28,6 @@ Cost to generate: 7 hours of 8xH100 (about $100).
 
 Details:
 - Embeddings are created with [Qwen3-Embedding-4B](https://huggingface.co/Qwen/Qwen3-Embedding-4B)
-- Embeddings have a dimension of 2048
+- Embeddings have a dimension of 2560
 - These are full-text embeddings of the entire text
 - A few thousand examples were discarded that were longer than 32k tokens