Fix syntax highlight issue with regular expression

We need to bump `rouge` gem version to fix syntax highlight issue when
code contains regular expressions.

Gemfile

@@ -159,7 +159,7 @@ gem 'wikicloth', '0.8.1'
 gem 'asciidoctor', '~> 2.0.10'
 gem 'asciidoctor-include-ext', '~> 0.3.1', require: false
 gem 'asciidoctor-plantuml', '~> 0.0.12'
-gem 'rouge', '~> 3.24.0'
+gem 'rouge', '~> 3.25.0'
 gem 'truncato', '~> 0.7.11'
 gem 'bootstrap_form', '~> 4.2.0'
 gem 'nokogiri', '~> 1.10.9'

Gemfile.lock

@@ -977,7 +977,7 @@ GEM
     rexml (3.2.4)
     rinku (2.0.0)
     rotp (2.1.2)
-    rouge (3.24.0)
+    rouge (3.25.0)
     rqrcode (0.7.0)
       chunky_png
     rqrcode-rails3 (0.1.7)
@@ -1468,7 +1468,7 @@ DEPENDENCIES
   request_store (~> 1.5)
   responders (~> 3.0)
   retriable (~> 3.1.2)
-  rouge (~> 3.24.0)
+  rouge (~> 3.25.0)
   rqrcode-rails3 (~> 0.1.7)
   rspec-parameterized
   rspec-rails (~> 4.0.0)

changelogs/unreleased/276911-fix-ruby-lexer-rouge-bug.yml

+---
+title: Fix syntax highlight issue with regular expressions
+merge_request: 47469
+author:
+type: fixed