add require of help to fix empty symlink

(cherry picked from commit d800891783fdb663ab28fbfcc94d27a12f3efef3)

postfix.spec

@@ -23,7 +23,7 @@
 Name:           postfix
 Summary:        Postfix Mail Transport Agent
 Version:        3.3.1
-Release:        20
+Release:        21
 Epoch:          2
 URL:            http://www.postfix.org
 License:        (IPL-1.0 and GPLv2+) or (EPL-2.0 and GPLv2+)
@@ -56,7 +56,7 @@ Requires(post): systemd-sysv %{_sbindir}/alternatives %{_bindir}/openssl
 Requires(pre):  %{_sbindir}/groupadd %{_sbindir}/useradd
 Requires(preun): %{_sbindir}/alternatives
 %{?systemd_requires}
-Requires: diffutils
+Requires: diffutils %{name}-help
 
 Provides:       MTA smtpd smtpdaemon server(smtp)
 Provides:       %{name}-mysql %{name}-sqlite %{name}-ldap %{name}-pcre
@@ -557,6 +557,12 @@ fi
 %{postfix_doc_dir}/README_FILES/*
 
 %changelog
+* Tue Jun 13 2023 zhouyihang <zhouyihang3@h-partners.com> - 2:3.3.1-21
+- Type:bugfix
+- ID:NA
+- SUG:NA
+- DESC:add require of help to fix empty symlink
+
 * Fri Mar 10 2023 gaihuiying <eaglegai@163.com> - 2:3.3.1-20
 - Type:bugfix
 - ID:NA