Update rubocop-rspec requirement from = 3.6.0 to = 3.7.0

Updates the requirements on [rubocop-rspec](https://github.com/rubocop/rubocop-rspec) to permit the latest version.
- [Release notes](https://github.com/rubocop/rubocop-rspec/releases)
- [Changelog](https://github.com/rubocop/rubocop-rspec/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-rspec@v3.6.0...v3.7.0)

---
updated-dependencies:
- dependency-name: rubocop-rspec
  dependency-version: 3.7.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

panolint-ruby.gemspec

@@ -21,5 +21,5 @@ Gem::Specification.new do |spec|
   # so that code bases using panolint-ruby will get the latest versions
   spec.add_dependency "rubocop", "1.75.6"
   spec.add_dependency "rubocop-performance", "1.25.0"
-  spec.add_dependency "rubocop-rspec", "3.6.0"
+  spec.add_dependency "rubocop-rspec", "3.7.0"
 end