[DATALAD RUNCMD] Update folder mapping for src/unfccc_ghg_data/unfccc_reader

=== Do not change lines below ===
{
 "chain": [],
 "cmd": "python3 src/unfccc_ghg_data/helper/folder_mapping.py --folder=src/unfccc_ghg_data/unfccc_reader",
 "dsid": "4d062170-604c-4efd-afbf-5ce7f97e0e63",
 "exit": 0,
 "extra_inputs": [],
 "inputs": [],
 "outputs": [
  "src/unfccc_ghg_data/unfccc_reader/folder_mapping.json"
 ],
 "pwd": "."
}
^^^ Do not change lines above ^^^

src/unfccc_ghg_data/unfccc_reader/folder_mapping.json

@@ -2,6 +2,7 @@
     "ARG": "Argentina",
     "BDI": "Burundi",
     "CHL": "Chile",
+    "CHN": "China",
     "COL": "Colombia",
     "GIN": "Guinea",
     "IDN": "Indonesia",
@@ -10,10 +11,11 @@
     "MAR": "Morocco",
     "MEX": "Mexico",
     "MNE": "Montenegro",
+    "MNG": "Mongolia",
     "MYS": "Malaysia",
     "NGA": "Nigeria",
     "PER": "Peru",
     "SGP": "Singapore",
     "THA": "Thailand",
     "TWN": "Taiwan"
-}
+}