Bump jekyll from 4.1.1 to 4.2.0 in /docs

Bumps [jekyll](https://github.com/jekyll/jekyll) from 4.1.1 to 4.2.0.
- [Release notes](https://github.com/jekyll/jekyll/releases)
- [Changelog](https://github.com/jekyll/jekyll/blob/master/History.markdown)
- [Commits](jekyll/jekyll@v4.1.1...v4.2.0)

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

docs/Gemfile.lock

@@ -26,21 +26,21 @@ GEM
     http_parser.rb (0.6.0)
     i18n (1.8.5)
       concurrent-ruby (~> 1.0)
-    jekyll (4.1.1)
+    jekyll (4.2.0)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
       i18n (~> 1.0)
       jekyll-sass-converter (~> 2.0)
       jekyll-watch (~> 2.0)
-      kramdown (~> 2.1)
+      kramdown (~> 2.3)
       kramdown-parser-gfm (~> 1.0)
       liquid (~> 4.0)
       mercenary (~> 0.4.0)
       pathutil (~> 0.9)
       rouge (~> 3.0)
       safe_yaml (~> 1.0)
-      terminal-table (~> 1.8)
+      terminal-table (~> 2.0)
     jekyll-feed (0.15.1)
       jekyll (>= 3.7, < 5.0)
     jekyll-gist (1.5.0)
@@ -61,7 +61,7 @@ GEM
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
     liquid (4.0.3)
-    listen (3.2.1)
+    listen (3.3.3)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.4.0)
@@ -79,14 +79,14 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rexml (3.2.4)
-    rouge (3.23.0)
+    rouge (3.26.0)
     safe_yaml (1.0.5)
     sassc (2.4.0)
       ffi (~> 1.9)
     sawyer (0.8.1)
       addressable (>= 2.3.5, < 2.6)
       faraday (~> 0.8, < 1.0)
-    terminal-table (1.8.0)
+    terminal-table (2.0.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     thread_safe (0.3.6)
     tzinfo (1.2.7)