fix: docs/Gemfile & docs/Gemfile.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-RUBY-WEBRICK-8068535

docs/Gemfile

@@ -29,7 +29,7 @@ gem "wdm", "~> 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]
 # do not have a Java counterpart.
 gem "http_parser.rb", "~> 0.6.0", :platforms => [:jruby]
 
-gem "webrick", "~> 1.7"
+gem "webrick", "~> 1.8", ">= 1.8.2"
 
 gem 'jekyll-seo-tag'
 

docs/Gemfile.lock

@@ -206,11 +206,15 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
+    mini_portile2 (2.8.7)
     minima (2.5.1)
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
     minitest (5.16.2)
+    nokogiri (1.15.4)
+      mini_portile2 (~> 2.8.2)
+      racc (~> 1.4)
     nokogiri (1.15.4-arm64-darwin)
       racc (~> 1.4)
     nokogiri (1.15.4-x86_64-darwin)
@@ -251,12 +255,13 @@ GEM
       unf_ext
     unf_ext (0.0.8.2)
     unicode-display_width (1.8.0)
-    webrick (1.7.0)
+    webrick (1.8.2)
     zeitwerk (2.6.0)
 
 PLATFORMS
   arm64-darwin-22
   arm64-darwin-23
+  ruby
   x86_64-darwin-20
   x86_64-darwin-21
 
@@ -270,7 +275,7 @@ DEPENDENCIES
   tzinfo (~> 1.2)
   tzinfo-data
   wdm (~> 0.1.1)
-  webrick (~> 1.7)
+  webrick (~> 1.8, >= 1.8.2)
 
 BUNDLED WITH
    2.4.19