BuildRequire dbus-1-daemon, required by our test suite

[Tumbleweed snapshot 20240825 announcement][tw0825] quotes dbus-1.changes:

> - No longer start or offer starting dbus as a system service
>   dbus-broker will be the only supported system dbus. Although
>   the existing daemon will stay as some things (gdm) require
>   dbus-run-session

[tw0825]: https://lists.opensuse.org/archives/list/factory@lists.opensuse.org/thread/GUIJNW45DGP25M7RS4EPAKTEP7IXEHWU/

dbus-broker is not a drop-in replacement:
for example it does not share the config file, so eventual migration to use it is not trivial

See also agama-project/agama#1562

TODO: test also with dbus-broker.rpm

package/gem2rpm.yml

@@ -78,6 +78,7 @@
   BuildRequires:  %{rubygem rake}
   BuildRequires:  %{rubygem rspec >= 3.9}
   BuildRequires:  dbus-1
+  BuildRequires:  dbus-1-daemon
   BuildRequires:  netcfg