[FFmpeg-cvslog] README: fix typo and description of libavfilter

[Gyan Doshi]

ffmpeg | branch: master | Gyan Doshi <ffmpeg at gyani.pro> | Fri Oct  8 10:02:34 2021 +0530| [f79be02be0abb7f4264fdc8467639eea7cd23d62] | committer: Gyan Doshi

README: fix typo and description of libavfilter

Thanks to Arif Driessen for bringing notice to the typo.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f79be02be0abb7f4264fdc8467639eea7cd23d62
---

 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 447347c700..f8c23f2870 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ such as audio, video, subtitles and related metadata.
 * `libavcodec` provides implementation of a wider range of codecs.
 * `libavformat` implements streaming protocols, container formats and basic I/O access.
 * `libavutil` includes hashers, decompressors and miscellaneous utility functions.
-* `libavfilter` provides a mean to alter decoded Audio and Video through chain of filters.
+* `libavfilter` provides means to alter decoded audio and video through a directed graph of connected filters.
 * `libavdevice` provides an abstraction to access capture and playback devices.
 * `libswresample` implements audio mixing and resampling routines.
 * `libswscale` implements color conversion and scaling routines.