[UI] Change icon for official image by "workspace_premium"

[ghusta]

Replace icon verified_user by workspace_premium

References :

• https://material.io/resources/icons
• https://fonts.google.com/icons?selected=Material+Icons:workspace_premium:&icon.platform=web&icon.query=premium

Visual :

• (new)
• (outlined)

Alternative :

• (verified)
• (_checkcircle) (outlined)