gh actions settup with cachix and nur-update heroku app only runs if not <YOUR_something_NAME>

[06kellyjac]

The GH actions config changed from:
if: ${{ matrix.cachixName != '' }}
to:
if: ${{ matrix.cachixName != '<YOUR_CACHIX_NAME>' }}
with the nur-update step having a similar update

Should it's behavior be to always set up cachix and trigger nur-update as long as there is a value?
Or should it only enable cachix for a specific cachix cache as you'll only have one secret key in secrets.CACHIX_SIGNING_KEY

Should there be separate cachix setups? One for a main cachix with CACHIX_SIGNING_KEY and one for the rest?

I'm guessing most users will only have 1 cachixName and one nurRepo in the matrix so that might be overkill

related commit: 52d63e8

[bignaux]

An issue with if: ${{ matrix.cachixName != '<YOUR_CACHIX_NAME>' }} , is that people tend to modify it since we use to complete <VAR> without more thought. On 46 github action configured nur, 6 put their cachix name, 9 removes it.