docs: fix typo in gst_index_new() docs
docs: fix typo in gst_index_new() docs

https://bugzilla.gnome.org/show_bug.cgi?id=642869

cfoch/gstreamer,lubosz/gstreamer,jpakkane/gstreamer,surround-io/gstreamer,jpxiong/gstreamer,magcius/gstreamer,drothlis/gstreamer,ahmedammar/platform_external_gst_gstreamer,Lachann/gstreamer,krichter722/gstreamer,mparis/gstreamer,ylatuya/gstreamer,StreamUtils/gstreamer,collects/gstreamer,justinjoy/gstreamer,lovebug356/gstreamer,ensonic/gstreamer,cablelabs/gstreamer,ylatuya/gstreamer,Distrotech/gstreamer,cablelabs/gstreamer,drothlis/gstreamer,krieger-od/gstreamer,lubosz/gstreamer,cfoch/gstreamer,cfoch/gstreamer,centricular/gstreamer,surround-io/gstreamer,lubosz/gstreamer,centricular/gstreamer,ahmedammar/platform_external_gst_gstreamer,centricular/gstreamer,cfoch/gstreamer,jpxiong/gstreamer,jpxiong/gstreamer,lubosz/gstreamer,krieger-od/gstreamer,drothlis/gstreamer,Distrotech/gstreamer,ahmedammar/platform_external_gst_gstreamer,jpakkane/gstreamer,ylatuya/gstreamer,jpakkane/gstreamer,surround-io/gstreamer,cfoch/gstreamer,collects/gstreamer,mparis/gstreamer,shelsonjava/gstreamer,cablelabs/gstreamer,ensonic/gstreamer,drothlis/gstreamer,krichter722/gstreamer,centricular/gstreamer,ahmedammar/platform_external_gst_gstreamer,Distrotech/gstreamer,collects/gstreamer,krieger-od/gstreamer,justinjoy/gstreamer,ensonic/gstreamer,krieger-od/gstreamer,jpxiong/gstreamer,lubosz/gstreamer,collects/gstreamer,jpakkane/gstreamer,justinjoy/gstreamer,jpakkane/gstreamer,StreamUtils/gstreamer,magcius/gstreamer,mparis/gstreamer,magcius/gstreamer,jpxiong/gstreamer,ylatuya/gstreamer,justinjoy/gstreamer,lovebug356/gstreamer,Lachann/gstreamer,krichter722/gstreamer,Lachann/gstreamer,Lachann/gstreamer,shelsonjava/gstreamer,lovebug356/gstreamer,magcius/gstreamer,centricular/gstreamer,krieger-od/gstreamer,surround-io/gstreamer,mparis/gstreamer,cablelabs/gstreamer,shelsonjava/gstreamer,ylatuya/gstreamer,cablelabs/gstreamer,ensonic/gstreamer,surround-io/gstreamer,magcius/gstreamer,shelsonjava/gstreamer,Lachann/gstreamer,Distrotech/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer,lovebug356/gstreamer,drothlis/gstreamer,Distrotech/gstreamer,mparis/gstreamer,ensonic/gstreamer,shelsonjava/gstreamer,collects/gstreamer,ahmedammar/platform_external_gst_gstreamer,krichter722/gstreamer,krichter722/gstreamer,StreamUtils/gstreamer,justinjoy/gstreamer,lovebug356/gstreamer