Fix Github -> GitHub

Author: smnandre

components/emoji.rst

@@ -34,18 +34,18 @@ textual representation in all languages based on the `Unicode CLDR dataset`_::
 
 
 The ``EmojiTransliterator`` also provides special locales that convert emojis to
-short codes and vice versa in specific platforms, such as Github and Slack.
+short codes and vice versa in specific platforms, such as GitHub and Slack.
 
-Github
+GitHub
 ~~~~~~
 
-Convert Github emojis to short codes with the ``emoji-github`` locale::
+Convert GitHub emojis to short codes with the ``emoji-github`` locale::
 
     $transliterator = EmojiTransliterator::create('emoji-github');
     $transliterator->transliterate('Teenage 🐢 really love 🍕');
     // => 'Teenage :turtle: really love :pizza:'
 
-Convert Github short codes to emojis with the ``github-emoji`` locale::
+Convert GitHub short codes to emojis with the ``github-emoji`` locale::
 
     $transliterator = EmojiTransliterator::create('github-emoji');
     $transliterator->transliterate('Teenage :turtle: really love :pizza:');