Correct Prost build issue.

[musitdev]

Using the current main branch, if the Cargo.lock file is removed the build fails with the error:

error[E0277]: the trait bound `celestia_tendermint_proto::v0_34::types::ValidatorSet: prost::Message` is not satisfied
    --> target/debug/build/celestia-proto-d9e58f87878dccfd/out/header.pb.rs:5:28
     |
5    | #[derive(Clone, PartialEq, ::prost::Message)]
     |                            ^^^^^^^^^^^^^^^^ the trait `prost::Message` is not implemented for `celestia_tendermint_proto::v0_34::types::ValidatorSet`
     |
     = help: the following other types implement trait `prost::Message`:

The issue comes from the fact that the crate celestia-tendermint-proto use the post version 0.13.3 and the proto crate the version 0.12.6.
I've changed the dependencies version to 0.13.3 but kept the build-dependencies to the old one because otherwise, build.rs doesn't build.