fix: Gemfile & Gemfile.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-RUBY-REXML-7814166

Gemfile

@@ -64,7 +64,7 @@ group :development, :test do
   gem "rubocop", ">= 1.65.1"
   gem "rubocop-performance", require: false
   gem "rubocop-rake", require: false
-  gem "rubocop-rails", require: false
+  gem "rubocop-rails", ">= 2.26.0", require: false
   gem "rubocop-rspec", require: false
 
   gem "codeclimate-test-reporter"

Gemfile.lock

@@ -172,8 +172,8 @@ GEM
       racc (~> 1.4)
     nokogiri (1.16.7-x86_64-linux)
       racc (~> 1.4)
-    parallel (1.25.1)
-    parser (3.3.4.0)
+    parallel (1.26.3)
+    parser (3.3.4.2)
       ast (~> 2.4.1)
       racc
     pg (1.5.7)
@@ -239,7 +239,7 @@ GEM
     regexp_parser (2.9.2)
     reline (0.5.9)
       io-console (~> 0.5)
-    rexml (3.3.4)
+    rexml (3.3.6)
       strscan
     rspec-core (3.13.0)
       rspec-support (~> 3.13.0)
@@ -271,15 +271,15 @@ GEM
       rubocop-ast (>= 1.31.1, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.32.0)
+    rubocop-ast (1.32.1)
       parser (>= 3.3.1.0)
     rubocop-performance (1.21.1)
       rubocop (>= 1.48.1, < 2.0)
       rubocop-ast (>= 1.31.1, < 2.0)
-    rubocop-rails (2.25.1)
+    rubocop-rails (2.26.0)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
-      rubocop (>= 1.33.0, < 2.0)
+      rubocop (>= 1.52.0, < 2.0)
       rubocop-ast (>= 1.31.1, < 2.0)
     rubocop-rake (0.6.0)
       rubocop (~> 1.0)
@@ -367,7 +367,7 @@ DEPENDENCIES
   rspec_junit_formatter
   rubocop (>= 1.65.1)
   rubocop-performance
-  rubocop-rails
+  rubocop-rails (>= 2.26.0)
   rubocop-rake
   rubocop-rspec
   ruby-lsp
@@ -383,4 +383,4 @@ RUBY VERSION
    ruby 3.2.4p170
 
 BUNDLED WITH
-   2.5.9
+   2.4.6