Add option "json" to CLI documentation

Signed-off-by: Johannes Kristan <[email protected]>

Author: bs-jokri

documentation/developer-guide/modules/tooling-guide/pages/samm-cli.adoc

@@ -95,7 +95,7 @@ The available options and their meaning can also be seen in the help text of the
 | _--custom-resolver_ : use an external resolver for the resolution of the model elements |
 .4+| aspect <model> to aas              | Generate Asset Administration Shell (AAS) submodel template for an Aspect Model  | `samm aspect AspectModel.ttl to aas`
                                         |  _--output, -o_ : output file path (default: stdout)           |
-                                        |  _--format, -f_ : output file format (xml or aasx, default: xml)|
+                                        |  _--format, -f_ : output file format (xml, json, or aasx, default: xml)|
 | _--custom-resolver_ : use an external resolver for the resolution of the model elements |
 |===