Update Roman Numeral with secure link and info (#2065)

Author: apolo49

exercises/roman-numerals/description.md

@@ -40,4 +40,4 @@ In Roman numerals 1990 is MCMXC:
 2000=MM
 8=VIII
 
-See also: [http://www.novaroma.org/via_romana/numbers.html](http://www.novaroma.org/via_romana/numbers.html)
+See also: [https://wiki.imperivm-romanvm.com/wiki/Roman_Numerals](https://wiki.imperivm-romanvm.com/wiki/Roman_Numerals)