Update x03.yml
Update x03.yml

Line 169 (x03A7) is the Unicode code point capital chi 'Χ'. The transliteration should 'X' rather than 'Ks' to be consistent with lower case version at line 201 (x03C7).
http://en.wikipedia.org/wiki/Greek_alphabet#Greek_in_Unicode
rsl/stringex,rp-pedraza/stringex