Fix slemicro check for selinux (#8526)

install.sh

@@ -509,7 +509,7 @@ setup_selinux() {
         rpm_target=sle
         rpm_site_infix=microos
         package_installer=zypper
-        if [ "${ID_LIKE:-}" = suse ] && [ "${VARIANT_ID:-}" = sle-micro ]; then
+        if [ "${ID_LIKE:-}" = suse ] && ( [ "${VARIANT_ID:-}" = sle-micro ] || [ "${ID:-}" = sle-micro ] ); then
             rpm_target=sle
             rpm_site_infix=slemicro
             package_installer=zypper
@@ -1045,3 +1045,4 @@ eval set -- $(escape "${INSTALL_K3S_EXEC}") $(quote "$@")
     create_service_file
     service_enable_and_start
 }
+