doc/encoders: Move libxavs2 to correct place in alphabetical order

doc/encoders.texi

@@ -2183,6 +2183,52 @@ ffmpeg -i input -c:v libx265 -x265-params crf=26:psy-rd=1 output.mp4
 @end example
 @end table
 
+@section libxavs2
+
+xavs2 AVS2-P2/IEEE1857.4 encoder wrapper.
+
+This encoder requires the presence of the libxavs2 headers and library
+during configuration. You need to explicitly configure the build with
+@option{--enable-libxavs2}.
+
+@subsection Options
+
+@table @option
+@item lcu_row_threads
+Set the number of parallel threads for rows from 1 to 8 (default 5).
+
+@item initial_qp
+Set the xavs2 quantization parameter from 1 to 63 (default 34). This is
+used to set the initial qp for the first frame.
+
+@item qp
+Set the xavs2 quantization parameter from 1 to 63 (default 34). This is
+used to set the qp value under constant-QP mode.
+
+@item max_qp
+Set the max qp for rate control from 1 to 63 (default 55).
+
+@item min_qp
+Set the min qp for rate control from 1 to 63 (default 20).
+
+@item speed_level
+Set the Speed level from 0 to 9 (default 0). Higher is better but slower.
+
+@item log_level
+Set the log level from -1 to 3 (default 0). -1: none, 0: error,
+1: warning, 2: info, 3: debug.
+
+@item xavs2-params
+Set xavs2 options using a list of @var{key}=@var{value} couples separated
+by ":".
+
+For example to specify libxavs2 encoding options with @option{-xavs2-params}:
+
+@example
+ffmpeg -i input -c:v libxavs2 -xavs2-params preset_level=5 output.avs2
+@end example
+@end table
+
 @section libxvid
 
 Xvid MPEG-4 Part 2 encoder wrapper.
@@ -2794,52 +2840,6 @@ Reduces detail but attempts to preserve color at extremely low bitrates.
 
 @end table
 
-@section libxavs2
-
-xavs2 AVS2-P2/IEEE1857.4 encoder wrapper.
-
-This encoder requires the presence of the libxavs2 headers and library
-during configuration. You need to explicitly configure the build with
-@option{--enable-libxavs2}.
-
-@subsection Options
-
-@table @option
-@item lcu_row_threads
-Set the number of parallel threads for rows from 1 to 8 (default 5).
-
-@item initial_qp
-Set the xavs2 quantization parameter from 1 to 63 (default 34). This is
-used to set the initial qp for the first frame.
-
-@item qp
-Set the xavs2 quantization parameter from 1 to 63 (default 34). This is
-used to set the qp value under constant-QP mode.
-
-@item max_qp
-Set the max qp for rate control from 1 to 63 (default 55).
-
-@item min_qp
-Set the min qp for rate control from 1 to 63 (default 20).
-
-@item speed_level
-Set the Speed level from 0 to 9 (default 0). Higher is better but slower.
-
-@item log_level
-Set the log level from -1 to 3 (default 0). -1: none, 0: error,
-1: warning, 2: info, 3: debug.
-
-@item xavs2-params
-Set xavs2 options using a list of @var{key}=@var{value} couples separated
-by ":".
-
-For example to specify libxavs2 encoding options with @option{-xavs2-params}:
-
-@example
-ffmpeg -i input -c:v libxavs2 -xavs2-params preset_level=5 output.avs2
-@end example
-@end table
-
 @c man end VIDEO ENCODERS
 
 @chapter Subtitles Encoders