bbatsov/rubocop

### Bug fixes

* [#9152](https://github.com/rubocop/rubocop/issues/9152): Fix an incorrect auto-correct for `Style/SoleNestedConditional` when nested `||` operator modifier condition. ([@koic][])
* [#9161](https://github.com/rubocop/rubocop/issues/9161): Fix a false positive for `Layout/HeredocArgumentClosingParenthesis` when using subsequence closing parentheses in the same line. ([@koic][])
* [#9151](https://github.com/rubocop/rubocop/issues/9151): Fix `SuggestExtensions` to not suggest extensions that are installed but not direct dependencies. ([@dvandersluis][])
* [#8985](https://github.com/rubocop/rubocop/issues/8985): Fix `Style/StringConcatenation` autocorrect generating invalid ruby. ([@tejasbubane][])
* [#9155](https://github.com/rubocop/rubocop/issues/9155): Fix a false positive for `Layout/MultilineMethodCallIndentation` when multiline method chain has expected indent width and the method is preceded by splat for `EnforcedStyle: indented_relative_to_receiver`. ([@koic][])

### Changes

* [#9080](https://github.com/rubocop/rubocop/issues/9080): Make `Lint/ShadowingOuterVariable` aware of `Ractor`. ([@tejasbubane][])
* [#9102](https://github.com/rubocop/rubocop/pull/9102): Relax regexp_parser requirement. ([@marcandre][])

[@koic]: https://github.com/koic
[@dvandersluis]: https://github.com/dvandersluis
[@tejasbubane]: https://github.com/tejasbubane
[@marcandre]: https://github.com/marcandre