G.723.1 doc and change log entry

Changelog

@@ -60,6 +60,7 @@ easier to use. The changes are:
 - libcdio-paranoia input device for audio CD grabbing
 - Apple ProRes decoder
 - CELT in Ogg demuxing
+- G.723.1 demuxer and decoder
 
 
 version 0.8:

doc/general.texi

@@ -106,6 +106,7 @@ library:
 @item framecrc testing format   @tab X @tab
 @item FunCom ISS                @tab   @tab X
     @tab Audio format used in various games from FunCom like The Longest Journey.
+@item G.723.1                   @tab   @tab X
 @item G.729 BIT                 @tab X @tab X
 @item GIF Animation             @tab X @tab
 @item GXF                       @tab X @tab X