Bump rubocop from 1.76.1 to 1.81.1

This release includes some updates in the Style/RedundantParentheses and
Naming/PredicateMethod rules. We're changing the code accordingly.

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.76.1 to 1.81.1.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop/rubocop/compare/v1.76.1...v1.81.1)

---
updated-dependencies:
- dependency-name: rubocop
  dependency-version: 1.81.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

app/controllers/concerns/search.rb

@@ -42,7 +42,7 @@ module Search
   end
 
   def search_finish_date
-    (params[:advanced_search][:date_max].to_date rescue Date.current) || Date.current
+    params[:advanced_search][:date_max].to_date rescue Date.current || Date.current
   end
 
   def search_date_range