Bump nokogiri from 1.10.10 to 1.11.1

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.10.10 to 1.11.1.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sparklemotion/nokogiri/compare/v1.10.10...v1.11.1)

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

Gemfile.lock

@@ -146,7 +146,7 @@ GEM
       nokogiri (>= 1.5.9)
     mercenary (0.4.0)
     method_source (1.0.0)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.5.0)
     mini_racer (0.3.1)
       libv8 (~> 8.4.255)
     minima (2.5.1)
@@ -155,8 +155,9 @@ GEM
       jekyll-seo-tag (~> 2.1)
     minitest (5.14.3)
     multipart-post (2.1.1)
-    nokogiri (1.10.10)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.11.0)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     nokogumbo (2.0.4)
       nokogiri (~> 1.8, >= 1.8.4)
     octokit (4.18.0)
@@ -168,6 +169,7 @@ GEM
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (4.0.6)
+    racc (1.5.2)
     rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)