chore(deps): update dependency minimal-mistakes-jekyll to v4.26.0 (#219)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
|
[minimal-mistakes-jekyll](https://togithub.com/mmistakes/minimal-mistakes)
| `"= 4.25.1"` -> `"= 4.26.0"` |
[![age](https://developer.mend.io/api/mc/badges/age/rubygems/minimal-mistakes-jekyll/4.26.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/rubygems/minimal-mistakes-jekyll/4.26.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/rubygems/minimal-mistakes-jekyll/4.25.1/4.26.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
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|

---

### Release Notes

<details>
<summary>mmistakes/minimal-mistakes (minimal-mistakes-jekyll)</summary>

###
[`v4.26.0`](https://togithub.com/mmistakes/minimal-mistakes/blob/HEAD/CHANGELOG.md#4260)

[Compare
Source](https://togithub.com/mmistakes/minimal-mistakes/compare/4.25.1...4.26.0)

##### Bug Fixes

- Fix an unclosed `<p>` tag in `page__hero.html`, near
`page.header.actions`.
- Remove overlay and revert X to hamburger icon when popup disappears.
[#&#8203;3958](https://togithub.com/mmistakes/minimal-mistakes/pull/3958)
- Fix SEO title when it contains a vertical bar.
[#&#8203;3094](https://togithub.com/mmistakes/minimal-mistakes/pull/3094)
[#&#8203;3113](https://togithub.com/mmistakes/minimal-mistakes/pull/3113)
- Remove "sticky sidebar" JS as it's now completely based on CSS media
queries.
[#&#8203;4245](https://togithub.com/mmistakes/minimal-mistakes/issues/4245)
[#&#8203;4645](https://togithub.com/mmistakes/minimal-mistakes/pull/4645)

##### Enhancements

- Add support for [Jekyll Paginate
V2](https://togithub.com/sverrirs/jekyll-paginate-v2) 🎉
[#&#8203;2636](https://togithub.com/mmistakes/minimal-mistakes/pull/2636)
- Add "copy to clipboard" button for code blocks 🎉
[#&#8203;2812](https://togithub.com/mmistakes/minimal-mistakes/pull/2812)
- Auto scroll sticky ToC with content.
[#&#8203;3115](https://togithub.com/mmistakes/minimal-mistakes/pull/3115)
- Replace "hidden" check in Liquid templates with `where_exp: "item",
"item.hidden != true"`.
- Remove deprecated `page.header.cta_url` setting.
[#&#8203;4821](https://togithub.com/mmistakes/minimal-mistakes/pull/4821)
- Allow multiple nav lists in sidebar.
[#&#8203;2843](https://togithub.com/mmistakes/minimal-mistakes/pull/2843)
- Add popup parameter to `{% include figure %}` to enable Magnific
Popup.
[#&#8203;3119](https://togithub.com/mmistakes/minimal-mistakes/pull/3119)
- Add target attribute for navigation link.
[#&#8203;3056](https://togithub.com/mmistakes/minimal-mistakes/pull/3056)
- Split schema to a separate include file.
[#&#8203;3085](https://togithub.com/mmistakes/minimal-mistakes/pull/3085)
-   Cleanup `_includes/seo.html`.

##### Documentation & Maintenance

-   Rewrite skin previews on `05-configuration.md` in Liquid template.
-   Remove unused classes from `_layouts/single.html`.
-   Migrate npm run scripts to Ruby Rake tasks.
- Add Rake task `version` for updating all hard-coded version numbers
from `package.json` all at once.
- Merge `categories` and `tags` layout into
`_includes/posts-taxonomy.html`.
- Update Social Sharing links section.
[#&#8203;4066](https://togithub.com/mmistakes/minimal-mistakes/pull/4066)

</details>

---

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Gemfile

@@ -33,4 +33,4 @@ gem "wdm", "= 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]
 gem "http_parser.rb", "< 0.8.1", :platforms => [:jruby]
 
 # the theme we are using
-gem "minimal-mistakes-jekyll", "= 4.25.1"
+gem "minimal-mistakes-jekyll", "= 4.26.0"