plugin-docs: the <TITLE> tag should come right after <FILE>
plugin-docs: the <TITLE> tag should come right after <FILE>

Fixes missing plugin entries. If the object name, e.g. GstXyz came before the
title, we ended up with differnt section_id in the generated docbook.

ystreet/gst-plugins-gl,ystreet/gst-plugins-gl,ystreet/gst-plugins-gl,mapmapteam/gst-plugins-gl,mapmapteam/gst-plugins-gl,mapmapteam/gst-plugins-gl