Upgrade BPP to v2

[ColdSauce]

Upgrades the Browser Plugin Publish Github action to v2. We also renamed our organization which is why that's different now!

Heads up the schema's changed a bit.

Here's an updated representation: https://raw.githubusercontent.com/plasmo-corp/bpp/v2/keys.schema.json Here's an example: https://github.com/PlasmoHQ/bpp/blob/main/keys.template.json