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/main/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.10.10...v1.11.1)

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

Gemfile.lock

@@ -296,7 +296,7 @@ GEM
     mime-types-data (3.2020.0512)
     mimemagic (0.3.5)
     mini_mime (1.0.2)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.5.0)
     minitest (5.14.2)
     mono_logger (1.1.0)
     msgpack (1.3.3)
@@ -305,8 +305,9 @@ GEM
       ruby2_keywords (~> 0.0.1)
     mysql2 (0.5.3)
     nio4r (2.5.2)
-    nokogiri (1.10.10)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.11.1)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     pdf-core (0.8.1)
     polyamorous (2.3.2)
       activerecord (>= 5.2.1)
@@ -328,6 +329,7 @@ GEM
     public_suffix (4.0.6)
     puma (4.3.5)
       nio4r (~> 2.0)
+    racc (1.5.2)
     rack (2.2.3)
     rack-contrib (2.2.0)
       rack (~> 2.0)