Bump nokogiri from 1.16.5 to 1.18.8 in /docs (#2669)

Author: dependabot[bot]

docs/Gemfile.lock

@@ -207,14 +207,14 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
-    mini_portile2 (2.8.6)
+    mini_portile2 (2.8.9)
     minima (2.5.1)
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
     minitest (5.25.1)
     multipart-post (2.1.1)
-    nokogiri (1.16.5)
+    nokogiri (1.18.8)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     octokit (4.20.0)
@@ -223,7 +223,7 @@ GEM
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (3.1.1)
-    racc (1.7.3)
+    racc (1.8.1)
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)