Add the Sentence Transformers tag to make this model easier to find

Hello!

## Pull Request overview
* Add the Sentence Transformers tag

## Details
With this tag, the model will now also show up here: https://huggingface.co/models?library=sentence-transformers&sort=trending, i.e. among all other popular embedding models.

- Tom Aarsen

README.md

@@ -5,6 +5,8 @@ language:
 - hy
 base_model:
 - intfloat/multilingual-e5-base
+tags:
+- sentence-transformers
 ---
 
 # Armenian-Text-Embeddings-1