Update rspec-rails requirement from ~> 6.0 to ~> 7.0

Updates the requirements on [rspec-rails](https:/rspec/rspec-rails) to permit the latest version.
- [Changelog](https:/rspec/rspec-rails/blob/main/Changelog.md)
- [Commits](rspec/rspec-rails@v6.0.0...v7.0.0)

---
updated-dependencies:
- dependency-name: rspec-rails
  dependency-type: direct:production
...

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

Gemfile

@@ -12,7 +12,7 @@ gem "sprockets-rails"
 gem "rspec-core"
 gem "rspec-expectations"
 gem "rspec-mocks"
-gem "rspec-rails", "~> 6.0"
+gem "rspec-rails", "~> 7.0"
 gem "rspec-support"
 
 gem "rubocop", "~> 1.4"