Build(deps): Bump rubocop-ast from 1.19.1 to 1.20.1 (#17819)

Bumps [rubocop-ast](https://github.com/rubocop/rubocop-ast) from 1.19.1 to 1.20.1.
- [Release notes](https://github.com/rubocop/rubocop-ast/releases)
- [Changelog](https://github.com/rubocop/rubocop-ast/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop/rubocop-ast/compare/v1.19.1...v1.20.1)

---
updated-dependencies:
- dependency-name: rubocop-ast
  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

@@ -428,7 +428,7 @@ GEM
       rubocop-ast (>= 1.19.1, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 3.0)
-    rubocop-ast (1.19.1)
+    rubocop-ast (1.20.1)
       parser (>= 3.1.1.0)
     rubocop-rspec (2.12.1)
       rubocop (~> 1.31)