Use setup-crate instead. For example:

- uses: extractions/setup-crate@v1
  with:
    owner: rust-lang
    name: mdBook

This GitHub Action will install the latest release of mdBook for you.

The semver specification is passed directly to NPM's semver package. This GitHub Action will install the latest matching release. Examples include

• mdbook-version: '*' latest version (default).
• mdbook-version: '0.4' equivalent to >=0.4.0 <0.5.0.
• mdbook-version: '0.4.x' equivalent to >=0.4.0 <0.5.0.
• mdbook-version: '0.4.6' equivalent to =0.4.6.
• mdbook-version: '^0.4.6' equivalent to >=0.4.6 <0.5.0.

Add the following to your workflow.

- uses: extractions/setup-mdbook@v1
  with:
    mdbook-version: 0.4
  env:
    # this is not required but add it if you get any rate limiting issues
    GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.