bind fails to build with sphinx 8.x in Fedora 42 (currently Rawhide).

The issue detected:
```
/builddir/build/BUILD/bind-9.18.31-build/bind-9.18.31/doc/dnssec-guide/recipes.rst:766: WARNING: Footnote [#] is not referenced. [ref.footnote]
/builddir/build/BUILD/bind-9.18.31-build/bind-9.18.31/doc/arm/general.rst:437: WARNING: Footnote [#] is not referenced. [ref.footnote]
/builddir/build/BUILD/bind-9.18.31-build/bind-9.18.31/doc/arm/general.rst:439: WARNING: Footnote [#] is not referenced. [ref.footnote]
/builddir/build/BUILD/bind-9.18.31-build/bind-9.18.31/doc/arm/general.rst:443: WARNING: Footnote [#] is not referenced. [ref.footnote]
/builddir/build/BUILD/bind-9.18.31-build/bind-9.18.31/doc/arm/general.rst:455: WARNING: Footnote [#] is not referenced. [ref.footnote]
make[2]: *** [Makefile:761: html-local] Error 1
```

It seems like there is upstream fix available:
https://gitlab.isc.org/isc-projects/bind9/-/merge_requests/9663

Please work with upstream on this issue, I plan to ship sphinx 8 in two weeks.


For the logs from testing build attempts, see:
https://copr.fedorainfracloud.org/coprs/thrnciar/python-sphinx/package/bind/

You can test you package in mock running:

$ mock -r fedora-rawhide-x86_64
--addrepo=https://download.copr.fedorainfracloud.org/results/thrnciar/python-sphinx/fedora-rawhide-x86_64/ --no-clean your.src.rpm
$ mock -r fedora-rawhide-x86_64
--addrepo=https://download.copr.fedorainfracloud.org/results/thrnciar/python-sphinx/fedora-rawhide-x86_64/ shell

We'd like to include Sphinx 8 in Fedora 42.
Let us know here if you have any questions. Thank you!