Sync the roman-numerals exercise's metadata with the latest data.

exercises/practice/roman-numerals/.meta/config.json

@@ -28,7 +28,7 @@
       "stack.yaml"
     ]
   },
-  "blurb": "Write a function to convert from normal numbers to Roman Numerals.",
+  "blurb": "Convert modern Arabic numbers into Roman numerals.",
   "source": "The Roman Numeral Kata",
   "source_url": "https://codingdojo.org/kata/RomanNumerals/"
 }