Fix modules.img relabeling for .0 mainline release

Mainline release like 5.19 or 6.0 really are 5.19.0 or 6.0.0. Use
appropriate macro in the genfs call that takes this into account.

kernel.spec.in

@@ -547,7 +547,7 @@ PATH=/usr/sbin:/sbin:$PATH mkfs.ext3 -F "-Enum_backup_sb=0,root_owner=0:0$flags"
     -d %buildroot%vm_install_dir/modules %buildroot%vm_install_dir/modules.img 512M
 
 %if 0%{?fedora} >= 32
-SOURCE_DATE_EPOCH=$SOURCE_DATE_EPOCH %{_builddir}/genfs %buildroot%vm_install_dir/modules.img %{VERSION}-%{RELEASE}.%{_arch} immutable=yes
+SOURCE_DATE_EPOCH=$SOURCE_DATE_EPOCH %{_builddir}/genfs %buildroot%vm_install_dir/modules.img %kernelrelease immutable=yes
 e2fsck -pDfE optimize_extents -- %buildroot%vm_install_dir/modules.img
 resize2fs -M -- %buildroot%vm_install_dir/modules.img
 e2fsck -pDfE optimize_extents -- %buildroot%vm_install_dir/modules.img