build(deps): bump the npm group with 2 updates (#14)

Updates the requirements on [mermaid](https://github.com/mermaid-js/mermaid) and [tocbot](https://github.com/tscanlin/tocbot) to permit the latest version.

Updates `mermaid` to 10.6.0
- [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/v10.5.0...v10.6.0)

Updates `tocbot` to 4.21.3
- [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/v4.21.2...v4.21.3)

---
updated-dependencies:
- 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>

README.md

@@ -57,11 +57,10 @@ Static assets (libraries/plugins/web-fonts) required by the [_Chirpy_][chirpy] b
 | [jQuery][jquery]                                         |   `3.7.1` |
 | [Loading-attribute-polyfill][loading-attribute-polyfill] |   `2.1.1` |
 | [Magnific Popup][magnific-popup]                         |   `1.1.0` |
-| [Mermaid][mermaid]                                       |  `10.5.0` |
+| [Mermaid][mermaid]                                       |  `10.6.0` |
 | [Simple-Jekyll-Search][simple-jekyll-search]             |  `1.10.0` |
-| [Tocbot][tocbot]                                         |  `4.21.2` |
+| [Tocbot][tocbot]                                         |  `4.21.3` |
 
-[assets]: https://github.com/cotes2020/chirpy-static-assets
 [chirpy]: https://github.com/cotes2020/jekyll-theme-chirpy
 
 <!-- deps -->