perl dependency renamed to perl-interpreter <https://fedoraproject.org/wiki/Changes/perl_Package_to_Install_Core_Modules>

khelpcenter.spec

@@ -34,7 +34,7 @@ BuildRequires:  kf5-kwindowsystem-devel
 BuildRequires:  kf5-rpm-macros
 BuildRequires:  libappstream-glib
 BuildRequires:  libxml2-devel
-BuildRequires:  perl
+BuildRequires:  perl-interpreter
 BuildRequires:  perl-generators
 BuildRequires:  qt5-qtbase-devel
 BuildRequires:  qt5-qtscript-devel