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: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Gemfile

@@ -17,7 +17,7 @@ gem "sass", "~>3.4"
 gem "html-proofer"
 gem "kramdown", "~>2.3.1"
 gem "kramdown-parser-gfm", "1.1.0"
-gem "nokogiri", "1.14.3"
+gem "nokogiri", "1.15.6"
 # Currently used version of nokogiri requires ruby >=2.6.0"
 
 # If you have any other plugins, list them here:

Gemfile.lock

@@ -54,17 +54,19 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
-    mini_portile2 (2.8.1)
-    nokogiri (1.14.3)
-      mini_portile2 (~> 2.8.0)
+    mini_portile2 (2.8.5)
+    nokogiri (1.15.6)
+      mini_portile2 (~> 2.8.2)
+      racc (~> 1.4)
+    nokogiri (1.15.6-x86_64-linux)
       racc (~> 1.4)
     nokogumbo (2.0.5)
       nokogiri (~> 1.8, >= 1.8.4)
     parallel (1.22.1)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (4.0.7)
-    racc (1.6.2)
+    racc (1.7.3)
     rainbow (3.1.1)
     rake (12.3.3)
     rb-fsevent (0.11.1)
@@ -93,7 +95,7 @@ DEPENDENCIES
   jekyll-paginate-v2
   kramdown (~> 2.3.1)
   kramdown-parser-gfm (= 1.1.0)
-  nokogiri (= 1.14.3)
+  nokogiri (= 1.15.6)
   rake (~> 12.0)
   sass (~> 3.4)
   wdm (~> 0.1.1)