Update README.md for mlqa (#3117)

The tasks are called without .yaml just the task name

lm_eval/tasks/mlqa/README.md

@@ -36,56 +36,56 @@ Homepage: `https://github.com/facebookresearch/MLQA`
 
 #### Tasks
 
-Tasks of the form `mlqa_context-lang_question-lang.yaml`
-* `mlqa_ar_ar.yaml`
-* `mlqa_ar_de.yaml`
-* `mlqa_ar_vi.yaml`
-* `mlqa_ar_zh.yaml`
-* `mlqa_ar_en.yaml`
-* `mlqa_ar_es.yaml`
-* `mlqa_ar_hi.yaml`
-* `mlqa_de_ar.yaml`
-* `mlqa_de_de.yaml`
-* `mlqa_de_vi.yaml`
-* `mlqa_de_zh.yaml`
-* `mlqa_de_en.yaml`
-* `mlqa_de_es.yaml`
-* `mlqa_de_hi.yaml`
-* `mlqa_vi_ar.yaml`
-* `mlqa_vi_de.yaml`
-* `mlqa_vi_vi.yaml`
-* `mlqa_vi_zh.yaml`
-* `mlqa_vi_en.yaml`
-* `mlqa_vi_es.yaml`
-* `mlqa_vi_hi.yaml`
-* `mlqa_zh_ar.yaml`
-* `mlqa_zh_de.yaml`
-* `mlqa_zh_vi.yaml`
-* `mlqa_zh_zh.yaml`
-* `mlqa_zh_en.yaml`
-* `mlqa_zh_es.yaml`
-* `mlqa_zh_hi.yaml`
-* `mlqa_en_ar.yaml`
-* `mlqa_en_de.yaml`
-* `mlqa_en_vi.yaml`
-* `mlqa_en_zh.yaml`
-* `mlqa_en_en.yaml`
-* `mlqa_en_es.yaml`
-* `mlqa_en_hi.yaml`
-* `mlqa_es_ar.yaml`
-* `mlqa_es_de.yaml`
-* `mlqa_es_vi.yaml`
-* `mlqa_es_zh.yaml`
-* `mlqa_es_en.yaml`
-* `mlqa_es_es.yaml`
-* `mlqa_es_hi.yaml`
-* `mlqa_hi_ar.yaml`
-* `mlqa_hi_de.yaml`
-* `mlqa_hi_vi.yaml`
-* `mlqa_hi_zh.yaml`
-* `mlqa_hi_en.yaml`
-* `mlqa_hi_es.yaml`
-* `mlqa_hi_hi.yaml`
+Tasks of the form `mlqa_context-lang_question-lang`
+* `mlqa_ar_ar`
+* `mlqa_ar_de`
+* `mlqa_ar_vi`
+* `mlqa_ar_zh`
+* `mlqa_ar_en`
+* `mlqa_ar_es`
+* `mlqa_ar_hi`
+* `mlqa_de_ar`
+* `mlqa_de_de`
+* `mlqa_de_vi`
+* `mlqa_de_zh`
+* `mlqa_de_en`
+* `mlqa_de_es`
+* `mlqa_de_hi`
+* `mlqa_vi_ar`
+* `mlqa_vi_de`
+* `mlqa_vi_vi`
+* `mlqa_vi_zh`
+* `mlqa_vi_en`
+* `mlqa_vi_es`
+* `mlqa_vi_hi`
+* `mlqa_zh_ar`
+* `mlqa_zh_de`
+* `mlqa_zh_vi`
+* `mlqa_zh_zh`
+* `mlqa_zh_en`
+* `mlqa_zh_es`
+* `mlqa_zh_hi`
+* `mlqa_en_ar`
+* `mlqa_en_de`
+* `mlqa_en_vi`
+* `mlqa_en_zh`
+* `mlqa_en_en`
+* `mlqa_en_es`
+* `mlqa_en_hi`
+* `mlqa_es_ar`
+* `mlqa_es_de`
+* `mlqa_es_vi`
+* `mlqa_es_zh`
+* `mlqa_es_en`
+* `mlqa_es_es`
+* `mlqa_es_hi`
+* `mlqa_hi_ar`
+* `mlqa_hi_de`
+* `mlqa_hi_vi`
+* `mlqa_hi_zh`
+* `mlqa_hi_en`
+* `mlqa_hi_es`
+* `mlqa_hi_hi`
 
 ### Checklist