Updated the Turkmen Manat symbol and HTML entity

Author: igor-alexandrov

config/currency_iso.json

@@ -2180,13 +2180,13 @@
     "priority": 100,
     "iso_code": "TMT",
     "name": "Turkmenistani Manat",
-    "symbol": "T",
+    "symbol": "m",
     "alternate_symbols": [],
     "subunit": "Tenge",
     "subunit_to_unit": 100,
     "symbol_first": false,
     "format": "%n %u",
-    "html_entity": "",
+    "html_entity": "m",
     "decimal_mark": ".",
     "thousands_separator": ",",
     "iso_numeric": "934",