build(deps): bump the npm group across 1 directory with 3 updates (#45)

Updates the requirements on [@fortawesome/fontawesome-free](https://github.com/FortAwesome/Font-Awesome), [mermaid](https://github.com/mermaid-js/mermaid) and [tocbot](https://github.com/tscanlin/tocbot) to permit the latest version.

Updates `@fortawesome/fontawesome-free` to 6.7.1
- [Release notes](https://github.com/FortAwesome/Font-Awesome/releases)
- [Changelog](https://github.com/FortAwesome/Font-Awesome/blob/6.x/CHANGELOG.md)
- [Commits](https://github.com/FortAwesome/Font-Awesome/compare/6.6.0...6.7.1)

Updates `mermaid` to 11.4.0
- [Release notes](https://github.com/mermaid-js/mermaid/releases)
- [Changelog](https://github.com/mermaid-js/mermaid/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/mermaid-js/mermaid/compare/mermaid@11.0.2...mermaid@11.4.0)

Updates `tocbot` to 4.32.2
- [Release notes](https://github.com/tscanlin/tocbot/releases)
- [Changelog](https://github.com/tscanlin/tocbot/blob/master/CHANGELOG.md)
- [Commits](https://github.com/tscanlin/tocbot/compare/v4.29.0...v4.32.2)

---
updated-dependencies:
- dependency-name: "@fortawesome/fontawesome-free"
  dependency-type: direct:production
  dependency-group: npm
- dependency-name: mermaid
  dependency-type: direct:production
  dependency-group: npm
- dependency-name: tocbot
  dependency-type: direct:production
  dependency-group: npm
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

tocbot/tocbot.min.css

@@ -1,6 +1,6 @@
 /**
  * Skipped minification because the original files appears to be already minified.
- * Original file: /npm/tocbot@4.29.0/dist/tocbot.css
+ * Original file: /npm/tocbot@4.32.2/dist/tocbot.css
  *
  * Do NOT use SRI with dynamically generated files! More information: https://www.jsdelivr.com/using-sri-with-dynamic-files
  */