oath-toolkit: Update to version 2.6.9

oath-toolkit: Update to version 2.6.9

- Update from version 2.6.7 to 2.6.9
- Update of rootfile not required
- Changelog
    2.6.9 (released 2023-07-09)
	** Improve compatibility with recent libxmlsec.
	** Update gnulib files, dropping gnulib self-tests.
    2.6.8 (released 2023-07-09)
	** libpskc: Fixes for recent libxmlsec releases.
	** pam_oath: Provide fallback pam_modutil_getpwnam implementation.
		Fixes <https://gitlab.com/oath-toolkit/oath-toolkit/-/issues/26> on
		Mac OS.  Patch from Nick Gaya <nicholasgaya+github@gmail.com>.
	** pam_oath: Don't fail authentication when pam_modutil_getpwnam doesn't
	** know the user when usersfile don't include ${USER} or ${HOME}. Closes: #27.
		Regression introduced in previous release.  Reported by Nick Gaya
		<nicholasgaya+github@gmail.com>.
	** pam_oath: Self-test improvements.
		Patch from Nick Gaya <nicholasgaya+github@gmail.com>.
	** liboath: Builds on Windows.
		The oath_authenticate_usersfile function is just a stub that returns
		an error.  This allows for use of the rest of the library on Windows.
		Thanks to David Woodhouse, see
		<https://gitlab.com/oath-toolkit/oath-toolkit/-/merge_requests/15>.
	** Disable PAM self-tests on Mac.  Fix --enable-root-tests logic.
	** Don't ship gtk-doc PDF's in tarball.
	** Use gitlog-to-changelog instead of git2cl.
	** Codespell typo fixes. Patch by Dimitri Papadopoulos.

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>