Make the Supplements specific to Fedora

... to retain consistency with xdg-desktop-portal-gtk.

It's not clear why the Supplements in xdg-desktop-portal-gtk is
specific to Fedora.  Meanwhile, at least, it doesn't hurt to keep
things consistent.

Resolves: #2051473

xdg-desktop-portal-gnome.spec

@@ -5,7 +5,7 @@
 
 Name:           xdg-desktop-portal-gnome
 Version:        41.1
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Backend implementation for xdg-desktop-portal using GNOME
 
 License:        LGPLv2+
@@ -24,8 +24,10 @@ BuildRequires:  systemd-rpm-macros
 Requires:       dbus
 Requires:       dbus-common
 Requires:       xdg-desktop-portal >= %{xdg_desktop_portal_version}
+%if 0%{?fedora}
 # Use rich deps to pull in this package when gnome-shell and flatpak (or snapd) are both installed
 Supplements:    (gnome-shell and (flatpak or snapd))
+%endif
 
 %description
 A backend implementation for xdg-desktop-portal that is using various pieces of
@@ -67,6 +69,11 @@ desktop-file-validate %{buildroot}/%{_datadir}/applications/%{name}.desktop
 
 
 %changelog
+* Tue Apr 05 2022 Debarshi Ray <rishi@fedoraproject.org> - 41.1-2
+- Make the Supplements specific to Fedora to retain consistency with
+  xdg-desktop-portal-gtk
+Resolves: #2051473
+
 * Sat Mar 05 2022 Debarshi Ray <rishi@fedoraproject.org> - 41.1-1
 - Initial version
 Resolves: #2051473