Bump nokogiri from 1.10.9 to 1.11.1

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/master/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.10.9...v1.11.1)

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

Author: dependabot[bot]

Gemfile.lock

@@ -156,16 +156,17 @@ GEM
     method_source (1.0.0)
     mimemagic (0.3.4)
     mini_mime (1.0.2)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.5.0)
     minitest (5.14.0)
     msgpack (1.3.3)
     multi_json (1.15.0)
     multi_xml (0.6.0)
     multipart-post (2.1.1)
     naught (1.1.0)
     nio4r (2.5.2)
-    nokogiri (1.10.9)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.11.1)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     oauth2 (1.4.4)
       faraday (>= 0.8, < 2.0)
       jwt (>= 1.0, < 3.0)
@@ -191,6 +192,7 @@ GEM
     public_suffix (4.0.6)
     puma (4.3.3)
       nio4r (~> 2.0)
+    racc (1.5.2)
     rack (2.2.2)
     rack-protection (2.1.0)
       rack