Bump github-pages from 226 to 227 in /docs (#1531)

docs/Gemfile

@@ -7,7 +7,7 @@ source "https://rubygems.org"
 #
 # This will help ensure the proper Jekyll version is running.
 # Happy Jekylling!
-gem "github-pages", "~> 226", group: :jekyll_plugins
+gem "github-pages", "~> 227", group: :jekyll_plugins
 # If you want to use GitHub Pages, remove the "gem "jekyll"" above and
 # uncomment the line below. To upgrade, run `bundle update github-pages`.
 # gem "github-pages", group: :jekyll_plugins

docs/Gemfile.lock

@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (5.2.8)
+    activesupport (5.2.8.1)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
@@ -34,7 +34,7 @@ GEM
     ffi (1.15.5)
     forwardable-extended (2.6.0)
     gemoji (3.0.1)
-    github-pages (226)
+    github-pages (227)
       github-pages-health-check (= 1.17.9)
       jekyll (= 3.9.2)
       jekyll-avatar (= 0.7.0)
@@ -76,7 +76,7 @@ GEM
       liquid (= 4.0.3)
       mercenary (~> 0.3)
       minima (= 2.5.1)
-      nokogiri (>= 1.13.4, < 2.0)
+      nokogiri (>= 1.13.6, < 2.0)
       rouge (= 3.26.0)
       terminal-table (~> 1.4)
     github-pages-health-check (1.17.9)
@@ -233,8 +233,8 @@ GEM
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
-    minitest (5.16.1)
-    nokogiri (1.13.6)
+    minitest (5.16.2)
+    nokogiri (1.13.8)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     octokit (4.25.1)
@@ -271,7 +271,7 @@ GEM
     thread_safe (0.3.6)
     typhoeus (1.4.0)
       ethon (>= 0.9.0)
-    tzinfo (1.2.9)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     unf (0.1.4)
       unf_ext
@@ -282,7 +282,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  github-pages (~> 226)
+  github-pages (~> 227)
   http_parser.rb (~> 0.6.0)
   jekyll-assets (~> 3.0.12)
   jekyll-feed (~> 0.12)