Bump nokogiri from 1.6.8.1 to 1.11.1 (#2)

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.6.8.1 to 1.11.1.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/master/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.6.8.1...v1.11.1)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -96,12 +96,13 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.7)
     maruku (0.7.0)
     mercenary (0.3.6)
-    mini_portile2 (2.1.0)
+    mini_portile2 (2.5.0)
     minitest (5.14.3)
     multipart-post (2.0.0)
     net-dns (0.8.0)
-    nokogiri (1.6.8.1)
-      mini_portile2 (~> 2.1.0)
+    nokogiri (1.11.1)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     octokit (4.6.0)
       sawyer (~> 0.8.0, >= 0.5.3)
     parslet (1.5.0)
@@ -111,6 +112,7 @@ GEM
     pygments.rb (0.6.3)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.2.0)
+    racc (1.5.2)
     rb-fsevent (0.9.8)
     rb-inotify (0.9.7)
       ffi (>= 0.5.0)