MAINTAINERS: Add myself for hlsenc

Signed-off-by: Steven Liu <lingjiujianke@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

MAINTAINERS

@@ -397,7 +397,7 @@ Muxers/Demuxers:
   gxf.c                                 Reimar Doeffinger
   gxfenc.c                              Baptiste Coudurier
   hls.c                                 Anssi Hannula
-  hls encryption (hlsenc.c)             Christian Suloway
+  hls encryption (hlsenc.c)             Christian Suloway, Steven Liu
   idcin.c                               Mike Melanson
   idroqdec.c                            Mike Melanson
   iff.c                                 Jaikrishnan Menon