Attribute gh-pages to github-actions bot

[cyschneck]

By default, the deployment of github-pages is authored by the github account that created the original repo. So accounts get a lot of "ghost" commits each day and any changes to the email/account will prevent gh-pages from running

It appears as though JamesIves/github-pages-deploy-action has an option to set git-config-name and git-config-email to the github actions bot to prevent this

So it would change (in deploy-book.yaml) from:

      - name: Deploy to GitHub Pages
        uses: JamesIves/github-pages-deploy-action@v4
        if: |
          (github.ref == 'refs/heads/main')
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          branch: gh-pages
          folder: ${{ inputs.publish_dir }}
          clean: true
          clean-exclude: _preview/*  # keep existing previews from other PRs
          target-folder: ${{ inputs.destination_dir }}

To:

      - name: Deploy to GitHub Pages
        uses: JamesIves/github-pages-deploy-action@v4
        if: |
          (github.ref == 'refs/heads/main')
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          git-config-name: 'github-actions[bot]'
          git-config-email: 'github-actions[bot]@users.noreply.github.com'
          branch: gh-pages
          folder: ${{ inputs.publish_dir }}
          clean: true
          clean-exclude: _preview/*  # keep existing previews from other PRs
          target-folder: ${{ inputs.destination_dir }}

(See a similar change NCAR/geocat-applications#287 for an example that runs a similar automated deployment)