Upgrade rustdoc-types

[BiagioFesta]

Currently, cargo check-external-types fails with the following:

[...] The version of rustdoc being used produces JSON format version 28, 
but this tool requires format version 27. [...]

That's because rustdocs bumped json-output format to version 28.

rustdoc-types@v0.24.0 contains this support change.

This crate should bump that dependency:

cargo-check-external-types/Cargo.toml

Line 16 in 4bbf5a8

rustdoc-types = "0.23.0"

To

rustdoc-types = "0.24.0"

[jdisanti]

We definitely need to upgrade, but for future reference, you should pin the nightly version you use in CI to the one listed in the README (currently nightly-2023-10-10) so that you don't get caught off guard in the future.

[jdisanti]

rustdoc-types has been updated to 0.24 in the v0.1.11 release (against nightly-2024-02-07).