Update model metadata to set pipeline tag to the new `text-ranking` (#1)

- Update model metadata to set pipeline tag to the new `text-ranking` (b950b87dfa2b05bcfe41b90b8465051b19735616)


Co-authored-by: Tom Aarsen <[email protected]>

README.md

@@ -10,6 +10,7 @@ tags:
 - reranking
 - arabic-nlp
 - nlp
+pipeline_tag: text-ranking
 ---