Add 'sentence-transformers' tag for easier discoverability (#2)

- Add 'sentence-transformers' tag for easier discoverability (f35e1d6a6055981b5d4ec89c3b5d0727e89f9bc8)


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

README.md

@@ -1,5 +1,7 @@
 ---
 license: cc-by-sa-4.0
+tags:
+- sentence-transformers
 task_categories:
 - sentence-similarity
 size_categories: