Remove whatsapp-icon CSS display

[javier-godoy]

Describe the bug

Update the web component version after FlowingCode/fc-whatsapp-button#8 is released.

Expected behavior

Icon should render INSIDE of the button.

Minimal reproducible example

https://addonsv25-staging.flowingcode.com/whatsappbutton

Add-on Version

2.1.1-SNAPSHOT

Vaadin Version

25.0.6

Additional information

No response