chore(deps-dev): bump jekyll-seo-tag from 2.7.1 to 2.8.0 in /docs (#4242)

Bumps [jekyll-seo-tag](https://github.com/jekyll/jekyll-seo-tag) from 2.7.1 to 2.8.0.
- [Release notes](https://github.com/jekyll/jekyll-seo-tag/releases)
- [Changelog](https://github.com/jekyll/jekyll-seo-tag/blob/master/History.markdown)
- [Commits](https://github.com/jekyll/jekyll-seo-tag/compare/v2.7.1...v2.8.0)

---
updated-dependencies:
- dependency-name: jekyll-seo-tag
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

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

docs/Gemfile

@@ -2,7 +2,7 @@ source 'https://rubygems.org'
 
 group :development, :test do
   gem 'jekyll', '~> 4.2.2'
-  gem 'jekyll-seo-tag', '~> 2.7.1'
+  gem 'jekyll-seo-tag', '~> 2.8.0'
   gem 'jekyll-sitemap', '~> 1.4.0'
   gem 'wdm', '~> 0.1.1', :install_if => Gem.win_platform?
 end

docs/Gemfile.lock

@@ -4,7 +4,7 @@ GEM
     addressable (2.8.0)
       public_suffix (>= 2.0.2, < 5.0)
     colorator (1.1.0)
-    concurrent-ruby (1.1.9)
+    concurrent-ruby (1.1.10)
     em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
@@ -33,13 +33,13 @@ GEM
       terminal-table (~> 2.0)
     jekyll-sass-converter (2.2.0)
       sassc (> 2.0.1, < 3.0)
-    jekyll-seo-tag (2.7.1)
+    jekyll-seo-tag (2.8.0)
       jekyll (>= 3.8, < 5.0)
     jekyll-sitemap (1.4.0)
       jekyll (>= 3.7, < 5.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    kramdown (2.3.1)
+    kramdown (2.4.0)
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
@@ -50,12 +50,12 @@ GEM
     mercenary (0.4.0)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (4.0.6)
+    public_suffix (4.0.7)
     rb-fsevent (0.11.1)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rexml (3.2.5)
-    rouge (3.28.0)
+    rouge (3.29.0)
     safe_yaml (1.0.5)
     sassc (2.4.0)
       ffi (~> 1.9)
@@ -73,7 +73,7 @@ PLATFORMS
 
 DEPENDENCIES
   jekyll (~> 4.2.2)
-  jekyll-seo-tag (~> 2.7.1)
+  jekyll-seo-tag (~> 2.8.0)
   jekyll-sitemap (~> 1.4.0)
   wdm (~> 0.1.1)
   webrick (~> 1.7)