Bump rubocop-rspec (#257)

Bumps [rubocop-rspec](https://github.com/rubocop-hq/rubocop-rspec) from 1.41.0 to 1.43.1.
- [Release notes](https://github.com/rubocop-hq/rubocop-rspec/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop-rspec/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-rspec@v1.41.0...v1.43.1)

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

notification-pusher/notification-pusher-actionmailer/Gemfile.lock

@@ -166,8 +166,8 @@ GEM
       unicode-display_width (>= 1.4.0, < 2.0)
     rubocop-ast (0.3.0)
       parser (>= 2.7.1.4)
-    rubocop-rspec (1.41.0)
-      rubocop (>= 0.68.1)
+    rubocop-rspec (1.43.1)
+      rubocop (~> 0.87)
     ruby-progressbar (1.10.1)
     sprockets (4.0.2)
       concurrent-ruby (~> 1.0)