[ruby-ecosystem/en] 'ruby' -> 'Ruby' + fix typo
[ruby-ecosystem/en] 'ruby' -> 'Ruby' (cont.)
[ruby-ecosystem/en] 'ruby' -> 'Ruby' (cont. cont.)
Merge pull request #669 from rafalchmiel/patch-1

[ruby-ecosystem/en] 'ruby' -> 'Ruby' + fix typo