docs: manual: fix name reversal in basics-pads
docs: manual: fix name reversal in basics-pads

https://bugzilla.gnome.org/show_bug.cgi?id=747532

jpxiong/gstreamer,centricular/gstreamer,StreamUtils/gstreamer,krichter722/gstreamer,krichter722/gstreamer,centricular/gstreamer,StreamUtils/gstreamer,centricular/gstreamer,centricular/gstreamer,krichter722/gstreamer,shelsonjava/gstreamer,StreamUtils/gstreamer,jpxiong/gstreamer,shelsonjava/gstreamer,StreamUtils/gstreamer,shelsonjava/gstreamer,jpxiong/gstreamer,jpxiong/gstreamer,StreamUtils/gstreamer,shelsonjava/gstreamer,jpxiong/gstreamer,krichter722/gstreamer,centricular/gstreamer,krichter722/gstreamer,shelsonjava/gstreamer