Please add tag for v1.22.2

[Jos Verlinde]

it would be nice if someone would add the [v1.22.2](https://github.com/micropython/micropython/tree/v1.22.2) tag to this repo as well.

I assume it would be to 7cdf708, same as v1.22.0 and v1.22.1.

[Damien George]

Thanks for the reminder. Now done.