doc: update data card

conversational_weather.json

@@ -107,9 +107,11 @@
       "model-ability": "Adequately expressing CONTRAST and JUSTIFY discourse relations with appropriate grouping of arguments; adequately generalizing to many combinations of arguments."
     },
     "curation": {
-      "has-additional-curation": "no",
-      "modification-types": [],
-      "modification-description": "N/A",
+      "has-additional-curation": "yes",
+      "modification-types": [
+        "data points removed"
+      ],
+      "modification-description": "The original repo contained a challenge set disc_test.tsv, which is a subset of the test set consisting of discourse relations (CONTRAST and JUSTIFY) , but also contained JOIN relations.\nThis discrepancy has been rectified in the GEM version. The rectified version has been added in the `challenge_sets` ",
       "has-additional-splits": "no",
       "additional-splits-description": "N/A",
       "additional-splits-capacicites": "N/A"