Use a more precise Recommends for libkxbcommon

The old one was the first one added, and referred to the package.
The later ones refer to the soname. Let's convert that one to that
too.

(cherry picked from commit a3524fc837)

systemd.spec

@@ -233,7 +233,6 @@ Requires:       %{name}-libs%{_isa} = %{version}-%{release}
 %{?fedora:Recommends:     %{name}-resolved = %{version}-%{release}}
 Recommends:     diffutils
 Requires:       (util-linux-core or util-linux)
-Recommends:     libxkbcommon%{_isa}
 Provides:       /bin/systemctl
 Provides:       /sbin/shutdown
 Provides:       syslog
@@ -275,6 +274,7 @@ Provides:       /usr/sbin/telinit
 %endif
 
 # Recommends to replace normal Requires deps for stuff that is dlopen()ed
+Recommends:     libxkbcommon.so.0%{?elf_suffix}
 Recommends:     libidn2.so.0%{?elf_suffix}
 Recommends:     libidn2.so.0(IDN2_0.0.0)%{?elf_bits}
 Recommends:     libpcre2-8.so.0%{?elf_suffix}