update assets/Core_openEuler-20.03-LTS.list.

assets/Core_openEuler-20.03-LTS.list

 # This is a list of RPMS which support basic Linux function such as dnf, ssh.
-#
+# You can get this list via 
+# "dnf install NetworkManager coreutils dnf dnf-plugins-core vim openssh 
+# passwd procps-ng systemd systemd-udev"
+# 
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  Package                            Arch    Version                 Repo  Size
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