avcodec: fix language

modules/codec/avcodec/avcodec.h

@@ -261,7 +261,7 @@ int ffmpeg_OpenCodec( decoder_t *p_dec );
 #define ENC_PROFILE_LONGTEXT N_( "Specify the AAC audio profile to use " \
    "for encoding the audio bitstream. It takes the following options: " \
    "main, low, ssr (not supported),ltp, hev1, hev2 (default: low). " \
-   "hev1  and hev2 are currently only with libfdk-aac enable ffmpeg/libav" )
+   "hev1  and hev2 are currently supported only with libfdk-aac enabled ffmpeg/libav" )
 
 #define AVCODEC_COMMON_MEMBERS   \
     int i_cat;                  \