build(deps-dev): bump rubocop-rails from 2.25.1 to 2.26.0

Bumps [rubocop-rails](https://github.com/rubocop/rubocop-rails) from 2.25.1 to 2.26.0.
- [Release notes](https://github.com/rubocop/rubocop-rails/releases)
- [Changelog](https://github.com/rubocop/rubocop-rails/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-rails@v2.25.1...v2.26.0)

---
updated-dependencies:
- dependency-name: rubocop-rails
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile

@@ -155,7 +155,7 @@ group :development, :test do
   gem "rubocop"
   # Rails add-on for static analysis.
   gem 'rubocop-performance'
-  gem "rubocop-rails", "~> 2.25.1"
+  gem "rubocop-rails", "~> 2.26.0"
   # Default rules for Rubocop.
   gem "standard", "~> 1.40"
   # Erb linter.

Gemfile.lock

@@ -594,10 +594,10 @@ GEM
     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)
     ruby-graphviz (1.2.5)
       rexml
@@ -786,7 +786,7 @@ DEPENDENCIES
   rspec-rails (~> 6.1.4)
   rubocop
   rubocop-performance
-  rubocop-rails (~> 2.25.1)
+  rubocop-rails (~> 2.26.0)
   sass-rails
   shoulda-matchers (~> 6.2)
   simple_form