[Feature] Rename app description in meta data

[laurensvalk]

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

When sharing a link to Pybricks Code you usually get a preview like this:

But not everyone knows what Powered Up and perhaps IDE means. It is not well known that Powered Up also spans SPIKE and MINDSTORMS.

Describe the solution you'd like / ideas

Pybricks: MicroPython coding for LEGO® hubs.

MicroPython coding for LEGO® hubs.

MicroPython coding for robotics.

[dlech]

For facebook we can add open graph tags: https://developers.facebook.com/docs/sharing/webmasters#markup