fix typo in docstring
fix typo in docstring

pexip/pygobject,davidmalcolm/pygobject,pexip/pygobject,MathieuDuponchelle/pygobject,davibe/pygobject,choeger/pygobject-cmake,jdahlin/pygobject,thiblahute/pygobject,sfeltman/pygobject,davidmalcolm/pygobject,sfeltman/pygobject,thiblahute/pygobject,thiblahute/pygobject,MathieuDuponchelle/pygobject,GNOME/pygobject,davibe/pygobject,davidmalcolm/pygobject,jdahlin/pygobject,GNOME/pygobject,choeger/pygobject-cmake,jdahlin/pygobject,GNOME/pygobject,sfeltman/pygobject,davibe/pygobject,davibe/pygobject,choeger/pygobject-cmake,pexip/pygobject,MathieuDuponchelle/pygobject