Bump rubocop-capybara from 2.20.0 to 2.21.0 (#412)

Bumps [rubocop-capybara](https://github.com/rubocop/rubocop-capybara) from 2.20.0 to 2.21.0.
- [Release notes](https://github.com/rubocop/rubocop-capybara/releases)
- [Changelog](https://github.com/rubocop/rubocop-capybara/blob/main/CHANGELOG.md)
- [Commits](rubocop/rubocop-capybara@v2.20.0...v2.21.0)

---
updated-dependencies:
- dependency-name: rubocop-capybara
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -55,7 +55,7 @@ GEM
       unicode-display_width (>= 2.4.0, < 3.0)
     rubocop-ast (1.31.3)
       parser (>= 3.3.1.0)
-    rubocop-capybara (2.20.0)
+    rubocop-capybara (2.21.0)
       rubocop (~> 1.41)
     rubocop-factory_bot (2.25.1)
       rubocop (~> 1.41)