fix: Gemfile & Gemfile.lock to reduce vulnerabilities

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

Gemfile

@@ -5,7 +5,7 @@ ruby '3.1.4'
 gem 'jekyll', '~> 4.3.2'
 gem 'kramdown-parser-gfm'
 gem 'sass', '~> 3.4.24'
-gem "webrick", "~> 1.8"
+gem "webrick", "~> 1.8", ">= 1.8.2"
 gem 'newrelic_rpm', '~> 9.7', '>= 9.7.1'
 
 group :jekyll_plugins do

Gemfile.lock

@@ -71,7 +71,7 @@ GEM
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
     unicode-display_width (2.5.0)
-    webrick (1.8.1)
+    webrick (1.8.2)
 
 PLATFORMS
   arm64-darwin-22
@@ -87,10 +87,10 @@ DEPENDENCIES
   kramdown-parser-gfm
   newrelic_rpm (~> 9.7, >= 9.7.1)
   sass (~> 3.4.24)
-  webrick (~> 1.8)
+  webrick (~> 1.8, >= 1.8.2)
 
 RUBY VERSION
    ruby 3.1.4p223
 
 BUNDLED WITH
-   2.4.19
+   2.3.26