Bump minimal-mistakes-jekyll from 4.19.1 to 4.19.3

Bumps [minimal-mistakes-jekyll](https://github.com/mmistakes/minimal-mistakes) from 4.19.1 to 4.19.3.
- [Release notes](https://github.com/mmistakes/minimal-mistakes/releases)
- [Changelog](https://github.com/mmistakes/minimal-mistakes/blob/master/CHANGELOG.md)
- [Commits](mmistakes/minimal-mistakes@4.19.1...4.19.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

Gemfile.lock

@@ -28,7 +28,7 @@ GEM
     execjs (2.7.0)
     faraday (1.0.1)
       multipart-post (>= 1.2, < 3)
-    ffi (1.12.2)
+    ffi (1.13.1)
     forwardable-extended (2.6.0)
     gemoji (3.0.1)
     github-pages (204)
@@ -204,7 +204,7 @@ GEM
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
-    minimal-mistakes-jekyll (4.19.1)
+    minimal-mistakes-jekyll (4.19.3)
       jekyll (>= 3.7, < 5.0)
       jekyll-feed (~> 0.1)
       jekyll-gist (~> 1.5)
@@ -221,7 +221,7 @@ GEM
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (3.1.1)
-    rb-fsevent (0.10.3)
+    rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rouge (3.13.0)