Fix: add .ruby-version to .gitignore
Fix: add .ruby-version to .gitignore

Jensderond/jensderond.github.io,kchien/kchien.github.io,iltercengiz/iltercengiz.github.io,Senorihl/Senorihl.github.io,officialgdggaborone/officialgdggaborone.github.io,officialgdggaborone/officialgdggaborone.github.io,iltercengiz/iltercengiz.github.io,sayidly/sayidly.github.io,Senorihl/Senorihl.github.io,sayidly/sayidly.github.io,Jensderond/jensderond.github.io,parambirs/parambirs.github.io,Senorihl/Senorihl.github.io