[documentation]: meta tag image (for social) link is incorrect

[rachelbt]

<meta property="og:image" content="https://github.com/Vonage/vivid-3/blob/3ed7695e719b94bd87621983eba29c4d2df496e6/assets/images/vivid-logo.jpeg">

should it be: https://raw.githubusercontent.com/Vonage/vivid-3/3ed7695e719b94bd87621983eba29c4d2df496e6/assets/images/vivid-logo.jpeg

[yinonov]

yes should be replaced to the latter