Update model author to dunzhang

(Note: infgrad still works, but using dunzhang is probably less confusing)

README.md

@@ -5492,7 +5492,7 @@ docs = [
 ]
 
 # ！The default dimension is 1024, if you need other dimensions, please clone the model and modify `modules.json` to replace `2_Dense_1024` with another dimension, e.g. `2_Dense_256` or `2_Dense_8192` !
-model = SentenceTransformer("infgrad/stella_en_1.5B_v5", trust_remote_code=True).cuda()
+model = SentenceTransformer("dunzhang/stella_en_1.5B_v5", trust_remote_code=True).cuda()
 query_embeddings = model.encode(queries, prompt_name=query_prompt_name)
 doc_embeddings = model.encode(docs)
 print(query_embeddings.shape, doc_embeddings.shape)