Recommend instead of Require iptables et al.

These have been optional runtime dependencies for a long time. Using
recommends allows minimal installs using only nftables as a backend.

firewalld.spec

@@ -1,7 +1,7 @@
 Summary: A firewall daemon with D-Bus interface providing a dynamic firewall
 Name: firewalld
 Version: 2.0.0
-Release: 4%{?dist}
+Release: 5%{?dist}
 URL:     http://www.firewalld.org
 License: GPLv2+
 Source0: https://github.com/firewalld/firewalld/releases/download/v%{version}/firewalld-%{version}.tar.bz2
@@ -23,7 +23,7 @@ BuildRequires: libxslt
 BuildRequires: iptables, ebtables, ipset
 BuildRequires: python3-devel
 BuildRequires: make
-Requires: iptables, ebtables, ipset
+Recommends: iptables, ebtables, ipset
 Suggests: iptables-nft
 Requires(post): systemd
 Requires(preun): systemd
@@ -311,6 +311,9 @@ fi
 %{_mandir}/man1/firewall-config*.1*
 
 %changelog
+* Mon Aug 07 2023 Eric Garver <eric@garver.life> - 2.0.0-5
+- Recommend iptables et al. instead of Require
+
 * Mon Aug 07 2023 Eric Garver <eric@garver.life> - 2.0.0-4
 - support qt6