Update rubocop-rails requirement from = 2.25.1 to = 2.26.0

Updates the requirements on [rubocop-rails](https://github.com/rubocop/rubocop-rails) to permit the latest version.
- [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:production
...

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

panolint-rails.gemspec

@@ -18,5 +18,5 @@ Gem::Specification.new do |spec|
   end
 
   spec.add_dependency "brakeman", "6.1.2"
-  spec.add_dependency "rubocop-rails", "2.25.1"
+  spec.add_dependency "rubocop-rails", "2.26.0"
 end