update

aicrowd.json

 {
     "challenge_id": "esci-challenge-for-improving-product-search",
-    "task": "task_1_query-product_ranking",  
+    "task": "task_3_product_substitute_identification",   
     "gpu": true, 
     "authors": ["aicrowd-username"],
-    "description": "task_2_multiclass_product_classification, task_3_product_substitute_identification",
+    "description": "task_2_multiclass_product_classification, task_1_query-product_ranking",
     "license": "MIT"
 }
\ No newline at end of file