Render placeholders in menu_name

[jaimergp]

Description

I had forgotten to render placeholders found in the menu_name key. This fixes that behavior so folks can things like do "menu_name": "{{ DISTRIBUTION_NAME }} shortcuts" to customize the Start Menu directory.

Checklist - did you ...

• Add a file to the news directory (using the template) for the next release's release notes?
• Add / update necessary tests?
• Add / update outdated documentation?

[jaimergp]

cc @marcoesters

[marcoesters]

LGTM

However, I am wondering if the rendering should be happening inside _load inside api.py

[jaimergp]

However, I am wondering if the rendering should be happening inside _load inside api.py

All the item rendering happens in the MenuItem instance. Directory creation also happens in the Menu class. I don't see how this would be beneficial 🤔

I'll merge for now and if necessary we can open a new PR.

Thanks!