Add sentence-transformers tag; will help with findability & MTEB filtering (#4)

- Add sentence-transformers tag; will help with findability & MTEB filtering (e8cf0a8ae5b2accda401723f2e694b164ceb83f8)


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

README.md

@@ -3,6 +3,7 @@ datasets:
 - allenai/c4
 library_name: transformers
 tags:
+- sentence-transformers
 - gte
 - mteb
 license: apache-2.0