Bump nokogiri from 1.10.9 to 1.11.1 in /docs

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.10.9 to 1.11.1.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](https://github.com/sparklemotion/nokogiri/compare/v1.10.9...v1.11.1)

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

docs/Gemfile.lock

@@ -23,10 +23,12 @@ GEM
       http_parser.rb (~> 0.6.0)
     ethon (0.12.0)
       ffi (>= 1.3.0)
+    eventmachine (1.2.7)
     eventmachine (1.2.7-x64-mingw32)
     execjs (2.7.0)
     faraday (0.15.4)
       multipart-post (>= 1.2, < 3)
+    ffi (1.11.1)
     ffi (1.11.1-x64-mingw32)
     forwardable-extended (2.6.0)
     gemoji (3.0.1)
@@ -202,20 +204,24 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
     mercenary (0.3.6)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.5.0)
     minima (2.5.0)
       jekyll (~> 3.5)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
     minitest (5.11.3)
     multipart-post (2.1.1)
-    nokogiri (1.10.9-x64-mingw32)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.11.1)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
+    nokogiri (1.11.1-x64-mingw32)
+      racc (~> 1.4)
     octokit (4.14.0)
       sawyer (~> 0.8.0, >= 0.5.3)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (3.1.1)
+    racc (1.5.2)
     rake (12.3.3)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)
@@ -244,18 +250,16 @@ GEM
     tzinfo-data (1.2019.2)
       tzinfo (>= 1.0.0)
     unicode-display_width (1.6.0)
-    wdm (0.1.1)
 
 PLATFORMS
+  ruby
   x64-mingw32
 
 DEPENDENCIES
   github-pages
-  jekyll-feed (~> 0.6)
   just-the-docs (~> 0.2)
   rouge (~> 2.2)
   tzinfo-data
-  wdm (~> 0.1.0)
 
 BUNDLED WITH
    2.1.4