Bump rubocop-rails from 2.8.1 to 2.9.1 (#505)

Bumps [rubocop-rails](https://github.com/rubocop-hq/rubocop-rails) from 2.8.1 to 2.9.1.
- [Release notes](https://github.com/rubocop-hq/rubocop-rails/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop-rails/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-rails@v2.8.1...v2.9.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

Gemfile.lock

@@ -239,7 +239,7 @@ GEM
       nenv (~> 0.1)
       shellany (~> 0.0)
     orm_adapter (0.5.0)
-    parallel (1.19.2)
+    parallel (1.20.1)
     parser (2.7.2.0)
       ast (~> 2.4.1)
     pdf-core (0.8.1)
@@ -339,12 +339,12 @@ GEM
       rubocop-ast (>= 0.6.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 2.0)
-    rubocop-ast (0.8.0)
+    rubocop-ast (1.3.0)
       parser (>= 2.7.1.5)
-    rubocop-rails (2.8.1)
+    rubocop-rails (2.9.1)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
-      rubocop (>= 0.87.0)
+      rubocop (>= 0.90.0, < 2.0)
     rubocop-rspec (1.44.1)
       rubocop (~> 0.87)
       rubocop-ast (>= 0.7.1)
@@ -424,7 +424,7 @@ GEM
     wkhtmltopdf-binary (0.12.6.5)
     xpath (3.2.0)
       nokogiri (~> 1.8)
-    zeitwerk (2.4.1)
+    zeitwerk (2.4.2)
 
 PLATFORMS
   ruby