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` (b28ff08de971cf1a70887fa2438b6d5e0d730e04)


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

README.md

@@ -9,6 +9,7 @@ tags:
 - reranking
 - arabic-nlp
 - nlp
+pipeline_tag: text-ranking
 ---