[MISC] (deps): Bump github-pages and jekyll in /docs (#1051)

Bumps [github-pages](https://github.com/github/pages-gem) and [jekyll](https://github.com/jekyll/jekyll). These dependencies needed to be updated together.

Updates `github-pages` from 204 to 206
- [Release notes](https://github.com/github/pages-gem/releases)
- [Commits](https://github.com/github/pages-gem/compare/v204...v206)

Updates `jekyll` from 3.8.5 to 3.8.7
- [Release notes](https://github.com/jekyll/jekyll/releases)
- [Changelog](https://github.com/jekyll/jekyll/blob/master/History.markdown)
- [Commits](https://github.com/jekyll/jekyll/compare/v3.8.5...v3.8.7)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

docs/Gemfile

@@ -8,7 +8,7 @@ source "https://rubygems.org"
 #
 # This will help ensure the proper Jekyll version is running.
 # Happy Jekylling!
-gem "jekyll", "~> 3.8.5"
+gem "jekyll", "~> 3.8.7"
 
 # This is the default theme for new Jekyll sites. You may change this to anything you like.
 #gem "minima", "~> 2.0"

docs/Gemfile.lock

@@ -26,14 +26,14 @@ GEM
       ffi (>= 1.3.0)
     eventmachine (1.2.7)
     execjs (2.7.0)
-    faraday (1.0.0)
+    faraday (1.0.1)
       multipart-post (>= 1.2, < 3)
     ffi (1.12.2)
     forwardable-extended (2.6.0)
     gemoji (3.0.1)
-    github-pages (204)
+    github-pages (206)
       github-pages-health-check (= 1.16.1)
-      jekyll (= 3.8.5)
+      jekyll (= 3.8.7)
       jekyll-avatar (= 0.7.0)
       jekyll-coffeescript (= 1.1.1)
       jekyll-commonmark-ghpages (= 0.1.6)
@@ -72,7 +72,7 @@ GEM
       mercenary (~> 0.3)
       minima (= 2.5.1)
       nokogiri (>= 1.10.4, < 2.0)
-      rouge (= 3.13.0)
+      rouge (= 3.19.0)
       terminal-table (~> 1.4)
     github-pages-health-check (1.16.1)
       addressable (~> 2.3)
@@ -86,7 +86,7 @@ GEM
     http_parser.rb (0.6.0)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    jekyll (3.8.5)
+    jekyll (3.8.7)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
@@ -208,22 +208,22 @@ GEM
       jekyll-seo-tag (~> 2.1)
     minitest (5.14.1)
     multipart-post (2.1.1)
-    nokogiri (1.10.8)
+    nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
-    octokit (4.16.0)
+    octokit (4.18.0)
       faraday (>= 0.9)
       sawyer (~> 0.8.0, >= 0.5.3)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (3.1.1)
     rake (12.3.3)
-    rb-fsevent (0.10.3)
+    rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rouge (3.13.0)
+    rouge (3.19.0)
-    ruby-enum (0.7.2)
+    ruby-enum (0.8.0)
       i18n
-    rubyzip (2.2.0)
+    rubyzip (2.3.0)
     safe_yaml (1.0.5)
     sass (3.7.4)
       sass-listen (~> 4.0.0)
@@ -236,11 +236,11 @@ GEM
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     thread_safe (0.3.6)
-    typhoeus (1.3.1)
+    typhoeus (1.4.0)
       ethon (>= 0.9.0)
     tzinfo (1.2.7)
       thread_safe (~> 0.1)
-    unicode-display_width (1.6.1)
+    unicode-display_width (1.7.0)
     zeitwerk (2.3.0)
 
 PLATFORMS
@@ -248,7 +248,7 @@ PLATFORMS
 
 DEPENDENCIES
   github-pages
-  jekyll (~> 3.8.5)
+  jekyll (~> 3.8.7)
   just-the-docs
   tzinfo-data