Update README.md

Nail081994 · Sep 9, 2022 · dad3062 · dad3062
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diff --git a/README.md b/README.md
@@ -12,6 +12,7 @@ Requirements
 Role Variables
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+- `docker_version` # version of docker main packages
 - `docker_ce_cli_version` # version of docker main packages
 - `containerd_version` # version of CRI Containerd to be installed
 - `docker_apt_repository` # docker's url of repository