Add note on command template for binary sensor and sensor in command_…

…line

source/_integrations/command_line.markdown

@@ -290,6 +290,12 @@ command_line:
           default: 30
 {% endconfiguration %}
 
+{% note %}
+
+While `command` is accepting a template for `sensor` and `binary_sensor`, it's only the arguments that can be a template. This means the command name itself cannot be generated by a template, but it must be literally provided.
+
+{% endnote %}
+
 ## Binary sensor
 
 To use your Command binary sensor in your installation, add the following to your {% term "`configuration.yaml`" %} file: