Bump rubocop from 1.25.1 to 1.26.0 (#16845)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile

@@ -140,7 +140,7 @@ group :development, :test do
   gem "pry", "~> 0.14" # An IRB alternative and runtime developer console
   gem "pry-rails", "~> 0.3" # Use Pry as your rails console
   gem "rspec-rails", "~> 5.1" # rspec-rails is a testing framework for Rails 3+
-  gem "rubocop", "~> 1.25", require: false # Automatic Ruby code style checking tool
+  gem "rubocop", "~> 1.26", require: false # Automatic Ruby code style checking tool
   gem "rubocop-performance", "~> 1.13", require: false # A collection of RuboCop cops to check for performance optimizations in Ruby code
   gem "rubocop-rails", "~> 2.13", require: false # Automatic Rails code style checking tool
   gem "rubocop-rspec", "~> 2.9", require: false # Code style checking for RSpec files

Gemfile.lock

@@ -686,13 +686,13 @@ GEM
     rspec-support (3.11.0)
     rss (0.2.9)
       rexml
-    rubocop (1.25.1)
+    rubocop (1.26.0)
       parallel (~> 1.10)
       parser (>= 3.1.0.0)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml
-      rubocop-ast (>= 1.15.1, < 2.0)
+      rubocop-ast (>= 1.16.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 3.0)
     rubocop-ast (1.16.0)
@@ -1006,7 +1006,7 @@ DEPENDENCIES
   rspec-rails (~> 5.1)
   rspec-retry (~> 0.6)
   rss (~> 0.2.9)
-  rubocop (~> 1.25)
+  rubocop (~> 1.26)
   rubocop-performance (~> 1.13)
   rubocop-rails (~> 2.13)
   rubocop-rspec (~> 2.9)