Update index.html

Author: Kikobeats

index.html

@@ -27,6 +27,7 @@
   <meta name="twitter:data1" value="npm install browserless --save"/>
   <!-- Open Graph general (Facebook, Pinterest & Google+) -->
   <meta name="og:title" content="browserless, a syntactic sugar API over Chrome Headless.">
+  <meta name="og:logo" content="https://browserless.js.org/static/logo.png">
   <meta name="og:description" content="a syntactic sugar API over Chrome Headless.">
   <meta name="og:image" content="https://browserless.js.org/static/logo-banner.png">
   <meta name="og:url" content="https://browserless.js.org">