Bump rubocop-rails from 2.27.0 to 2.28.0 in the rubocop group (#568)

* Bump rubocop-rails from 2.27.0 to 2.28.0 in the rubocop group

Bumps the rubocop group with 1 update: [rubocop-rails](https://github.com/rubocop/rubocop-rails).


Updates `rubocop-rails` from 2.27.0 to 2.28.0
- [Release notes](https://github.com/rubocop/rubocop-rails/releases)
- [Changelog](https://github.com/rubocop/rubocop-rails/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-rails@v2.27.0...v2.28.0)

---
updated-dependencies:
- dependency-name: rubocop-rails
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: rubocop
...

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

* Update gemset.nix

---------

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

Gemfile.lock

@@ -86,7 +86,7 @@ GEM
       erubi (~> 1.4)
       parser (>= 2.4)
       smart_properties
-    bigdecimal (3.1.8)
+    bigdecimal (3.1.9)
     bindex (0.8.1)
     bootsnap (1.18.4)
       msgpack (~> 1.2)
@@ -158,7 +158,7 @@ GEM
     irb (1.14.3)
       rdoc (>= 4.0.0)
       reline (>= 0.4.2)
-    json (2.9.0)
+    json (2.9.1)
     language_server-protocol (3.17.0.3)
     logger (1.6.4)
     loofah (2.23.1)
@@ -255,7 +255,7 @@ GEM
       logger
     rdoc (6.10.0)
       psych (>= 4.0.0)
-    regexp_parser (2.9.3)
+    regexp_parser (2.10.0)
     reline (0.6.0)
       io-console (~> 0.5)
     rexml (3.3.9)
@@ -277,7 +277,7 @@ GEM
     rubocop-performance (1.23.0)
       rubocop (>= 1.48.1, < 2.0)
       rubocop-ast (>= 1.31.1, < 2.0)
-    rubocop-rails (2.27.0)
+    rubocop-rails (2.28.0)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
       rubocop (>= 1.52.0, < 2.0)