Micropython download page add link/anchor to variant section headers

[andrewleech]

Checks

• I agree to follow the MicroPython Code of Conduct to ensure a safe and respectful space for everyone.

• I've searched for existing issues regarding this feature, and didn't find any.

Description

On the micropython download page for devices with variants, it would be really helpful to be able to link directly to a particular variant.

Eg.
https://micropython.org/download/ESP32_GENERIC/

I was recently recommending a user install the spiram variant and had to describe to them scroll down until you see the header "Firmware (Support for SPIRAM / WROVER)"

It would be really helpful if each variant header could have an anchor link added which could be easily shared instead.

Code Size

No code size / change.

Implementation

• I intend to implement this feature and would submit a Pull Request if desirable.
• I hope the MicroPython maintainers or community will implement this feature.
• I would like to Sponsor development of this feature.