[FFmpeg-cvslog] doc/filters: Update commands doc for amix

[Jun Zhao]

ffmpeg | branch: master | Jun Zhao <barryjzhao at tencent.com> | Sat Apr 10 15:45:13 2021 +0800| [d5e575ef6a30dfbfa74bc74f18932c03106dc0d2] | committer: Jun Zhao

doc/filters: Update commands doc for amix

commit 95b854dd06 "rename sum option to normalize" missed command
part docs

Signed-off-by: Jun Zhao <barryjzhao at tencent.com>
Reviewed-by: Gyan Doshi <ffmpeg at gyani.pro>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d5e575ef6a30dfbfa74bc74f18932c03106dc0d2
---

 doc/filters.texi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/filters.texi b/doc/filters.texi
index 03ca9ae7f0..22d02c38f7 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -1947,7 +1947,7 @@ by this filter if this option is disabled. By default is enabled.
 This filter supports the following commands:
 @table @option
 @item weights
- at item sum
+ at item normalize
 Syntax is same as option with same name.
 @end table