update wording

Author: kzk

index.html

@@ -29,7 +29,7 @@
   <meta property="fb:admins"      content="588883490,100000237607356,741094668" />
   <meta property="og:type"        content="website" />
   <meta property="og:title"       content="Fluentd: Log Everything in JSON" />
-  <meta property="og:description" content="Fluentd is a log collector daemon written in Ruby. Fluentd receives logs as JSON streams, buffers them, and sends them to other systems like MySQL, MongoDB, or even other instances of Fluentd." />
+  <meta property="og:description" content="Fluentd is a lightweight and flexible log collector. Fluentd receives logs as JSON streams, buffers them, and sends them to other systems like MySQL, MongoDB, or even other instances of Fluentd." />
   <meta property="og:url"         content="http://fluentd.org/" />
   <meta property="og:image"       content="http://fluentd.org/logos/fluentd.png" />
 </head>