Upload Taichu-UniRetriever-v1.json

Dear organizers,
We need to rename the model and resubmit it to the MMEB benchmark，thank you.

scores/Taichu-UniRetriever-v1.json

@@ -1,6 +1,6 @@
 {
     "metadata": {
-        "model_name": "Taichu-UniRetriever-v1",
+        "model_name": "Taichu-UniRetriever-v1-8B",
         "model_size": "8.77",
         "embedding_dimension": null,
         "max_length_tokens": null,