Update share/site/duckduckgo/meta/about.tx

Changed: <meta name="twitter:player" 
value="http://duckduckgo.com/assets/player.swf?file=http://dcol7pgeg4982.cloudfront.net/video/AboutDuckDuckGo-v2.mp4"> 

to: 

<meta name="twitter:player" 
value="https://duckduckgo.com/assets/player.swf?file=http://dcol7pgeg4982.cloudfront.net/video/AboutDuckDuckGo-v2.mp4">