Change "github" to "GitHub" and "AnkiDroid Javascript API" to "AnkiDroid JavaScript API" on wiki pages

[jwkwshjsjsj]

1. https://github.com/ankidroid/Anki-Android/wiki
   "github" —> "GitHub"
   "AnkiDroid JavaScript API"

2. https://github.com/ankidroid/Anki-Android/wiki/AnkiDroid-Javascript-API
   "AnkiDroid Javascript API" —> "AnkiDroid JavaScript API"