Bump nokogiri from 1.13.6 to 1.18.8

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.13.6 to 1.18.8.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.13.6...v1.18.8)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-version: 1.18.8
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -222,7 +222,7 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
-    mini_portile2 (2.8.1)
+    mini_portile2 (2.8.9)
     minima (2.5.1)
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
@@ -236,8 +236,8 @@ GEM
       jekyll-sitemap (~> 1.3)
     minitest (5.14.4)
     multipart-post (2.1.1)
-    nokogiri (1.14.3)
-      mini_portile2 (~> 2.8.0)
+    nokogiri (1.18.8)
+      mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     octokit (4.20.0)
       faraday (>= 0.9)
@@ -246,7 +246,7 @@ GEM
       forwardable-extended (~> 2.6)
     progressbar (1.11.0)
     public_suffix (4.0.6)
-    racc (1.6.2)
+    racc (1.8.1)
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)