Fix name for ANG currency

"Gulden" is part of the Dutch name "Antilliaanse gulden".
The English name is "Netherlands Antillean guilder".

Also note that officially it's styled with lowercase "guilder" [1,2] but opting for "Guilder" to be consistent with the title-case naming style of other currencies in this library.

[1]: https://www.centralbank.cw/functions/banknotes-coins/caribbean-guilder
[2]: https://www.centralbank.cw/storage/app/media/caribbean_guilder/20250404_caribbean_guilder_introduction_flyer_english.pdf

Author: dideler

config/currency_iso.json

@@ -67,7 +67,7 @@
   "ang": {
     "priority": 100,
     "iso_code": "ANG",
-    "name": "Netherlands Antillean Gulden",
+    "name": "Netherlands Antillean Guilder",
     "symbol": "ƒ",
     "alternate_symbols": ["NAƒ", "NAf", "f"],
     "subunit": "Cent",