Bump rouge from 3.8.0 to 3.9.0 (#3837)

Bumps [rouge](https://github.com/rouge-ruby/rouge) from 3.8.0 to 3.9.0.
- [Release notes](https://github.com/rouge-ruby/rouge/releases)
- [Changelog](https://github.com/rouge-ruby/rouge/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rouge-ruby/rouge/compare/v3.8.0...v3.9.0)

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

Gemfile

@@ -73,7 +73,7 @@ gem "recaptcha", "~> 5.1", require: "recaptcha/rails" # Helpers for the reCAPTCH
 gem "redcarpet", "~> 3.5" # A fast, safe and extensible Markdown to (X)HTML parser
 gem "reverse_markdown", "~> 1.1" # Map simple html back into markdown
 gem "rolify", "~> 5.2" # Very simple Roles library
-gem "rouge", "~> 3.8" # A pure-ruby code highlighter
+gem "rouge", "~> 3.9" # A pure-ruby code highlighter
 gem "rubyzip", "~> 1.2" # Rubyzip is a ruby library for reading and writing zip files
 gem "s3_direct_upload", "~> 0.1" # Direct Upload to Amazon S3
 gem "sail", "~> 1.5" # Sail is a lightweight Rails engine that brings an admin panel for managing configuration settings on a live Rails app

Gemfile.lock

@@ -617,7 +617,7 @@ GEM
     reverse_markdown (1.1.0)
       nokogiri
     rolify (5.2.0)
-    rouge (3.8.0)
+    rouge (3.9.0)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)
       rspec-expectations (~> 3.8.0)
@@ -924,7 +924,7 @@ DEPENDENCIES
   redcarpet (~> 3.5)
   reverse_markdown (~> 1.1)
   rolify (~> 5.2)
-  rouge (~> 3.8)
+  rouge (~> 3.9)
   rspec-rails (~> 3.8)
   rspec-retry (~> 0.6)
   rubocop (~> 0.74)