Add 'sentence-transformers' tag (#2)

- Add 'sentence-transformers' tag (d77446a268f0b7bf4ca8ea46c09cde2b09f5c6b7)


Co-authored-by: Tom Aarsen <tomaarsen@users.noreply.huggingface.co>

README.md

@@ -1,6 +1,7 @@
 ---
 tags:
 - mteb
+- sentence-transformers
 model-index:
 - name: piccolo-large-zh-v2
   results: