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

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-RUBY-REXML-8309365

driver/Gemfile

@@ -3,7 +3,7 @@
 source 'https://rubygems.org'
 
 group :devel do # required for development
-  gem 'rubocop'
+  gem 'rubocop', '>= 1.66.0'
 end
 
 gem 'md-validator-client'

driver/Gemfile.lock

@@ -7,45 +7,46 @@ GEM
     ethon (0.16.0)
       ffi (>= 1.15.0)
     ffi (1.15.5)
-    json (2.6.2)
+    json (2.7.5)
+    language_server-protocol (3.17.0.3)
     md-validator-client (1.0.3)
       addressable (~> 2.3, >= 2.3.8)
       json (~> 2.1, >= 2.1.0)
       typhoeus (~> 1.0, >= 1.0.1)
-    parallel (1.22.1)
-    parser (3.1.2.1)
+    parallel (1.26.3)
+    parser (3.3.5.1)
       ast (~> 2.4.1)
+      racc
     public_suffix (5.0.0)
+    racc (1.8.1)
     rainbow (3.1.1)
-    regexp_parser (2.6.0)
-    rexml (3.2.8)
-      strscan (>= 3.0.9)
-    rubocop (1.38.0)
+    regexp_parser (2.9.2)
+    rubocop (1.68.0)
       json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
-      parser (>= 3.1.2.1)
+      parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 1.8, < 3.0)
-      rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.23.0, < 2.0)
+      regexp_parser (>= 2.4, < 3.0)
+      rubocop-ast (>= 1.32.2, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 3.0)
-    rubocop-ast (1.23.0)
-      parser (>= 3.1.1.0)
-    ruby-progressbar (1.11.0)
-    strscan (3.1.0)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.33.0)
+      parser (>= 3.3.1.0)
+    ruby-progressbar (1.13.0)
     typhoeus (1.4.0)
       ethon (>= 0.9.0)
-    unicode-display_width (2.3.0)
+    unicode-display_width (2.6.0)
 
 PLATFORMS
+  ruby
   x86_64-darwin-21
   x86_64-darwin-22
   x86_64-linux
 
 DEPENDENCIES
   md-validator-client
-  rubocop
+  rubocop (>= 1.66.0)
 
 BUNDLED WITH
    2.4.1