Wrong reference in the VimPlug instalation at VimAwesome

https://vimawesome.com/plugin/vdebug

For the VimPlug installation section, it points to `Plug 'joonty/vdebug'` but it should be `Plug 'vim-vdebug/vdebug'` such as is mentioned in the docs before. 

<img width="866" alt="image" src="https://user-images.githubusercontent.com/14207635/115211004-25ed9880-a0cd-11eb-8fc4-e15ca1e23b64.png">

https://vimawesome.com/plugin/vdebug