Use release-plz for automated releases

[ghost]

📬 Issue #, if available:

✍️ Description of changes:

🔏 By submitting this pull request

• I confirm that I've ran cargo +nightly fmt.
• I confirm that I've ran cargo clippy --fix.
• I confirm that I've made a best effort attempt to update all relevant documentation.
• I confirm that my contribution is made under the terms of the Apache 2.0 license.

[jlizen]

I highly recommend integrating with trusted publishing as part of this PR, which lets you do:

      - name: Authenticate to crates.io
        uses: rust-lang/crates-io-auth-action@v1
        id: auth
      - name: Run release-plz
        uses: release-plz/action@v0.5.102
        with:
          command: release
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          CARGO_REGISTRY_TOKEN: ${{ steps.auth.outputs.token }}

#1035