[FEAT] Update the Live IDE examples to demonstrate the use of the new Style Update API

[tbouffard]

Is your feature request related to a problem? Please describe.
Note: this is a similar request to that of #470
We already showcase how to use the CSS class API. The Style Update API provides an alternative way to style a dedicated BPMN element.

Required a release including process-analytics/bpmn-visualization-js#1030.

Describe the solution you'd like
List of examples: see https://cdn.statically.io/gh/process-analytics/bpmn-visualization-examples/v0.31.0/examples/index.html#miscellaneous
We probably should update the BPMN Diagram to provide more elements. The current diagram only provide 3 elements and we cannot demonstrate all styling capabilities on so few elements.