codecparsers : Trying to link to non-existing symbol

Building the documentation on a modern system (fedora 40) and latest hotdoc will fail with the following errors:

WARNING: [core]: (gtk-doc-bad-link): /home/bilboed/work/devel/gstreamer/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/gstav1parser.c:44:11: Trying to link to non-existing symbol ‘GST_AV1_OBU_SEQUENCE_HEADER’
00042: * you should call the differents functions to parse the structure details:
00043: *
00044: *   * %GST_AV1_OBU_SEQUENCE_HEADER: gst_av1_parser_parse_sequence_header_obu()
               ^
00045: *
00046: *   * %GST_AV1_OBU_TEMPORAL_DELIMITER: gst_av1_parser_parse_temporal_delimiter_obu()
....

A full failure run is available here : https://gitlab.freedesktop.org/bilboed/gstreamer/-/jobs/63858159

This is the only remaining (set of) issue from a documentation perspective to switch the CI to fedora 40