fix: Update ipld in iroh-car to limit prost duplicates

[fabricedesre]

Before:

iroh (main)> cargo tree -i -p prost
error: There are multiple `prost` packages in your project, and the specification `prost` is ambiguous.
Please re-run this command with `-p <spec>` where `<spec>` is one of the following:
  prost@0.9.0
  prost@0.10.4
  prost@0.11.0

After:

iroh (main)> cargo tree -i -p prost
error: There are multiple `prost` packages in your project, and the specification `prost` is ambiguous.
Please re-run this command with `-p <spec>` where `<spec>` is one of the following:
  prost@0.10.4
  prost@0.11.0

I'm trying to get rid of the last dupe in ipld/libipld#152 but windows CI gets in the way...

[fabricedesre]

I wonder why this was not done in f54eb73

[b5]

@Arqu mind taking a look? I have a hard time seeing how this would be a problem

[dignifiedquire]

lgtm if ci is happy