docs: add 'Since' tag for new GST_DEBUG_CATEGORY_GET macro
docs: add 'Since' tag for new GST_DEBUG_CATEGORY_GET macro

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