Bump nokogiri from 1.14.3 to 1.15.6

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.14.3 to 1.15.6.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.14.3...v1.15.6)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-type: indirect
...

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

Gemfile.lock

@@ -10,18 +10,6 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (6.1.4.1)
-      actionpack (= 6.1.4.1)
-      activesupport (= 6.1.4.1)
-      nio4r (~> 2.0)
-      websocket-driver (>= 0.6.1)
-    actionmailbox (6.1.4.1)
-      actionpack (= 6.1.4.1)
-      activejob (= 6.1.4.1)
-      activerecord (= 6.1.4.1)
-      activestorage (= 6.1.4.1)
-      activesupport (= 6.1.4.1)
-      mail (>= 2.7.1)
     actionmailer (6.1.4.1)
       actionpack (= 6.1.4.1)
       actionview (= 6.1.4.1)
@@ -36,12 +24,6 @@ GEM
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.2.0)
-    actiontext (6.1.4.1)
-      actionpack (= 6.1.4.1)
-      activerecord (= 6.1.4.1)
-      activestorage (= 6.1.4.1)
-      activesupport (= 6.1.4.1)
-      nokogiri (>= 1.8.5)
     actionview (6.1.4.1)
       activesupport (= 6.1.4.1)
       builder (~> 3.1)
@@ -56,13 +38,6 @@ GEM
     activerecord (6.1.4.1)
       activemodel (= 6.1.4.1)
       activesupport (= 6.1.4.1)
-    activestorage (6.1.4.1)
-      actionpack (= 6.1.4.1)
-      activejob (= 6.1.4.1)
-      activerecord (= 6.1.4.1)
-      activesupport (= 6.1.4.1)
-      marcel (~> 1.0.0)
-      mini_mime (>= 1.1.0)
     activesupport (6.1.4.1)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 1.6, < 2)
@@ -84,39 +59,27 @@ GEM
       nokogiri (>= 1.5.9)
     mail (2.7.1)
       mini_mime (>= 0.1.1)
-    marcel (1.0.2)
     method_source (1.0.0)
     mini_mime (1.1.1)
-    mini_portile2 (2.8.1)
+    mini_portile2 (2.8.5)
     minitest (5.14.4)
-    nio4r (2.5.8)
-    nokogiri (1.14.3)
-      mini_portile2 (~> 2.8.0)
+    nokogiri (1.15.6)
+      mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     parallel (1.21.0)
     parser (3.0.2.0)
       ast (~> 2.4.1)
-    racc (1.6.2)
+    racc (1.7.3)
     rack (2.2.6.4)
     rack-proxy (0.7.0)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
-    rails (6.1.4.1)
-      actioncable (= 6.1.4.1)
-      actionmailbox (= 6.1.4.1)
-      actionmailer (= 6.1.4.1)
-      actionpack (= 6.1.4.1)
-      actiontext (= 6.1.4.1)
-      actionview (= 6.1.4.1)
-      activejob (= 6.1.4.1)
-      activemodel (= 6.1.4.1)
-      activerecord (= 6.1.4.1)
-      activestorage (= 6.1.4.1)
-      activesupport (= 6.1.4.1)
-      bundler (>= 1.15.0)
-      railties (= 6.1.4.1)
-      sprockets-rails (>= 2.0.0)
+    rails (0.9.5)
+      actionmailer (>= 0.6.1)
+      actionpack (>= 1.4.0)
+      activerecord (>= 1.6.0)
+      rake (>= 0.4.15)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
@@ -148,20 +111,10 @@ GEM
       rubocop-ast (>= 0.4.0)
     ruby-progressbar (1.11.0)
     semantic_range (3.0.0)
-    sprockets (4.0.2)
-      concurrent-ruby (~> 1.0)
-      rack (> 1, < 3)
-    sprockets-rails (3.2.2)
-      actionpack (>= 4.0)
-      activesupport (>= 4.0)
-      sprockets (>= 3.0.0)
     thor (1.1.0)
     tzinfo (2.0.5)
       concurrent-ruby (~> 1.0)
     unicode-display_width (2.1.0)
-    websocket-driver (0.7.5)
-      websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.5)
     zeitwerk (2.6.6)
 
 PLATFORMS