Failure in vendor dependencies - publish-dry-run workflow

[psheth9]

Issue: publish-dry-run has been failing since last week, check here

Run cp Cargo.toml Cargo.toml.bak
    Updating crates.io index
    Updating crates.io index
error: failed to sync

Caused by:
  failed to load pkg lockfile

Caused by:
  failed to select a version for `soroban-env-host`.
      ... required by package `preflight v[20](https://github.com/stellar/soroban-rpc/actions/runs/8177724010/job/22360018493#step:8:21).3.3 (/home/runner/work/soroban-rpc/soroban-rpc/cmd/soroban-rpc/lib/preflight)`
  versions that meet the requirements `=20.2.2` are: 20.2.2

  the package `preflight` depends on `soroban-env-host`, with features: `unstable-next-api` but `soroban-env-host` does not have these features.


  failed to select a version for `soroban-env-host` which could resolve this conflict
Error: Process completed with exit code 101.

More reasons to have this configured in slack

[psheth9]

unstable-next-api is part of soroban-env-host 20.3.0

Will be resolved by this PR: #113