doc: Fix unbalanced parenthesis
doc: Fix unbalanced parenthesis

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