README: fix analisys/analysis typo

README.md

@@ -19,7 +19,7 @@ such as audio, video, subtitles and related metadata.
 * [ffmpeg](http://ffmpeg.org/ffmpeg.html) is a command line toolbox to
   manipulate, convert and stream multimedia content.
 * [ffplay](http://ffmpeg.org/ffplay.html) is a minimalistic multimedia player.
-* [ffprobe](http://ffmpeg.org/ffprobe.html) is a simple analisys tool to inspect
+* [ffprobe](http://ffmpeg.org/ffprobe.html) is a simple analysis tool to inspect
   multimedia content.
 * Additional small tools such as `aviocat`, `ismindex` and `qt-faststart`.