Update promicro_pretty.js for Ergogen 4.x

[PedroTheIntern]

No description provided.

[infused-kim]

Thank you! This PR solved my problem of this footprint not working in ergogen v4.

To make this more findable in google, I was getting this error:

Scaffolding PCBs...
TypeError: Cannot read properties of undefined (reading 'GND')
    at Object.body (eval at exports.unpack (/opt/homebrew/lib/node_modules/ergogen/src/io.js:26:24), <anonymous>:169:19)
    at /opt/homebrew/lib/node_modules/ergogen/src/pcbs.js:274:15
    at exports.parse (/opt/homebrew/lib/node_modules/ergogen/src/pcbs.js:337:33)
    at Object.process (/opt/homebrew/lib/node_modules/ergogen/src/ergogen.js:82:27)
    at /opt/homebrew/lib/node_modules/ergogen/src/cli.js:127:29
make: *** [ergogen] Error 3

@Albert-IV perhaps the repo could adopt a new structure of having ergogen_v3/ and ergogen_v4/ directories at the root to make it easier for users?

[Albert-IV]

Honestly we can probably update the libraries we have in here to be v4 compliant. I think there's a way of packaging modules to extend Ergogen built into the API now, maybe it would be best to have this repo only concern itself with packaging nice community modules rather than patching modules into the Ergogen node_modules files.