Update nix mix deps sha256

[zoedsoupe]

On commit 2178b4b there was an update to dialyzer mix dependency. That causes a new state for mix.lock and therefore a new sha256 hash for the mix FOD deps build with nix.

[scohen]

@hauleth the detection scripts don't seem to be working.

[skbolton]

I am starting to think that it would be better to not try and have the nix definition stay up to date with main. It could make more sense to go to a release model and pin a tag and then as part of the release process update the nix definition.

[skbolton]

but for the sake of keeping what is in place working it looks like there still might be permissions errors https://github.com/lexical-lsp/lexical/actions/runs/8012127382/job/21886809560

Or this mysterious error on the last deps update https://github.com/lexical-lsp/lexical/actions/runs/8459424205/job/23175709907

[scohen]

I fixed the permissions error. The other error doesn't look like anything to me.

[skbolton]

@scohen any reason to not merge this? Otherwise nix folks are going to have to wait till the next time deps update (and the action runs correctly) in order to build main successfully.

[scohen]

One reason is that main isn't in a great state right now

[skbolton]

Sounds good @scohen. Just wanted to make sure you weren't thinking things were resolved by the action fix.

[hauleth]

Ahh, yeah. I need to update the script a little, as it is expected to fail, so it should take that into the account.

[hauleth]

683 supersedes this PR

[scohen]

Closing in favor of #683