Update README.md (XPQARetrieval (fra-fra)->(fr))

README.md

@@ -4703,7 +4703,7 @@ model-index:
       type: Retrieval
   - dataset:
       config: fra-fra
-      name: MTEB XPQARetrieval (fra-fra)
+      name: MTEB XPQARetrieval (fr)
       revision: c99d599f0a6ab9b85b065da6f9d94f9cf731679f
       split: test
       type: jinaai/xpqa