Add example get API version
Getting the client API version is non-intuitive.
Other keys follow the json example or the version output, however `'{{.Client.ApiVersion}}'` does not work, nor does `'{{.Client.APIversion}}'`
@@ -69,6 +69,14 @@ $ docker version --format '{{.Server.Version}}'
19.03.8
```
+### Get the client API version
+
+```console
+$ docker version --format '{{.Client.APIVersion}}'
+
+1.41
+```
+
### Dump raw JSON data
```console
