Update app screenshot to Nextcloud 25 design

[ChristophWurst]

Is your feature request related to a problem? Please describe.

https://raw.githubusercontent.com/nextcloud/screenshots/master/apps/Contacts/contacts.png shows the old design

Describe the solution you'd like

Update

• README
• info.xml (app store)

Describe alternatives you've considered

No response

Additional context

No response

[GretaD]

@ChristophWurst info.xml doesnt have screenshots, should i add it there too?

[ChristophWurst]

contacts/appinfo/info.xml

Line 38 in ef66b3b

<screenshot>https://raw.githubusercontent.com/nextcloud/screenshots/master/apps/Contacts/contacts.png</screenshot>

it link so the same image

[ChristophWurst]

https://apps.nextcloud.com/apps/contacts already had the new image