[media] DocBook media: Fix a typo in encoder cmd

A copy-paste from DECODER_CMD : replace decoded by encoded.
Signed-off-by: NJean-Michel Hautbois <jean-michel.hautbois@veo-labs.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Documentation/DocBook/media/v4l/vidioc-encoder-cmd.xml

@@ -130,7 +130,7 @@ encoding will continue until the end of the current <wordasword>Group
 Of Pictures</wordasword>, otherwise encoding will stop immediately.
 When the encoder is already stopped, this command does
 nothing. mem2mem encoders will send a <constant>V4L2_EVENT_EOS</constant> event
-when the last frame has been decoded and all frames are ready to be dequeued and
+when the last frame has been encoded and all frames are ready to be dequeued and
 will set the <constant>V4L2_BUF_FLAG_LAST</constant> buffer flag on the last
 buffer of the capture queue to indicate there will be no new buffers produced to
 dequeue. This buffer may be empty, indicated by the driver setting the