upload to testpypi didn't work for me

[dimaqq]

maturin action "upload" didn't work for me.

Ultimately I've fixed my CI to using stock PYPA action:

https://github.com/dimaqq/otlp-proto/commit/cfecaa73152b96f9fa51b990fc603376a430658d

How it works:

• maturin action(s) are still used to build the artefacts in separate jobs
• last job downloads all the artefacts into dist/
• PYPA trusted publishing action is used to push everything from there

I understand that this is a poor bug report. I'm mainly leaving this for others who may run into the same problem.