Update regions for India (IN).

On 2023-11-23 ISO made the following code changes:
OR -> OD, CT -> CG, TG -> TS, UT -> UK.

Source: https://www.iso.org/obp/ui/#iso:code:3166:IN

formats.go

@@ -680,16 +680,16 @@ var formats = map[string]Format{
 		Regions: NewRegionMap(
 			"AN", "Andaman & Nicobar", "AP", "Andhra Pradesh", "AR", "Arunachal Pradesh",
 			"AS", "Assam", "BR", "Bihar", "CH", "Chandigarh",
-			"CT", "Chhattisgarh", "DH", "Dadra & Nagar Haveli & Daman & Diu",
+			"CG", "Chhattisgarh", "DH", "Dadra & Nagar Haveli & Daman & Diu",
 			"DL", "Delhi", "GA", "Goa", "GJ", "Gujarat",
 			"HR", "Haryana", "HP", "Himachal Pradesh", "JK", "Jammu & Kashmir",
 			"JH", "Jharkhand", "KA", "Karnataka", "KL", "Kerala",
 			"LA", "Ladakh", "LD", "Lakshadweep", "MP", "Madhya Pradesh",
 			"MH", "Maharashtra", "MN", "Manipur", "ML", "Meghalaya",
-			"MZ", "Mizoram", "NL", "Nagaland", "OR", "Odisha",
+			"MZ", "Mizoram", "NL", "Nagaland", "OD", "Odisha",
 			"PY", "Puducherry", "PB", "Punjab", "RJ", "Rajasthan",
-			"SK", "Sikkim", "TN", "Tamil Nadu", "TG", "Telangana",
-			"TR", "Tripura", "UP", "Uttar Pradesh", "UT", "Uttarakhand",
+			"SK", "Sikkim", "TN", "Tamil Nadu", "TS", "Telangana",
+			"TR", "Tripura", "UP", "Uttar Pradesh", "UK", "Uttarakhand",
 			"WB", "West Bengal",
 		),
 	},