Fix typo in crictl environment variable export
The export command and the exported variable are wrong.
@@ -193,7 +193,7 @@ RuntimeApiVersion: v1alpha1
```
> to avoid setting --runtime-endpoint when calling crictl,
-> you can run `export $CRI_RUNTIME_ENDPOINT=unix:///var/run/crio/crio.sock version`
+> you can run `export CONTAINER_RUNTIME_ENDPOINT=unix:///var/run/crio/crio.sock`
> or `cp crictl.yaml /etc/crictl.yaml` from this repo
### CNI plugins
