Bump rubocop-performance from 1.23.1 to 1.26.0

We're changing the `.rubocop.yml` file because we were getting a
warning:

```
rubocop-performance extension supports plugin, specify `plugins:
rubocop-performance` instead of `require: rubocop-performance` in
.rubocop.yml. For more information, see
https://docs.rubocop.org/rubocop/plugin_migration_guide.html
```

Bumps [rubocop-performance](https://github.com/rubocop/rubocop-performance) from 1.23.1 to 1.26.0.
- [Release notes](https://github.com/rubocop/rubocop-performance/releases)
- [Changelog](https://github.com/rubocop/rubocop-performance/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop/rubocop-performance/compare/v1.23.1...v1.26.0)

---
updated-dependencies:
- dependency-name: rubocop-performance
  dependency-version: 1.26.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

.rubocop.yml

@@ -1,9 +1,9 @@
 plugins:
   - rubocop-capybara
   - rubocop-factory_bot
+  - rubocop-performance
   - rubocop-rspec
 require:
-  - rubocop-performance
   - rubocop-rails
   - rubocop-rspec_rails
 

Gemfile

@@ -106,7 +106,7 @@ group :development do
   gem "rubocop", "~> 1.76.1", require: false
   gem "rubocop-capybara", "~> 2.22.1", require: false
   gem "rubocop-factory_bot", "~> 2.27.1", require: false
-  gem "rubocop-performance", "~> 1.23.1", require: false
+  gem "rubocop-performance", "~> 1.26.1", require: false
   gem "rubocop-rails", "~> 2.29.1", require: false
   gem "rubocop-rspec", "~> 3.7.0", require: false
   gem "rubocop-rspec_rails", "~> 2.30.0", require: false

Gemfile.lock

@@ -645,9 +645,10 @@ GEM
     rubocop-factory_bot (2.27.1)
       lint_roller (~> 1.1)
       rubocop (~> 1.72, >= 1.72.1)
-    rubocop-performance (1.23.1)
+    rubocop-performance (1.26.1)
-      rubocop (>= 1.48.1, < 2.0)
+      lint_roller (~> 1.1)
-      rubocop-ast (>= 1.31.1, < 2.0)
+      rubocop (>= 1.75.0, < 2.0)
+      rubocop-ast (>= 1.47.1, < 2.0)
     rubocop-rails (2.29.1)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
@@ -889,7 +890,7 @@ DEPENDENCIES
   rubocop (~> 1.76.1)
   rubocop-capybara (~> 2.22.1)
   rubocop-factory_bot (~> 2.27.1)
-  rubocop-performance (~> 1.23.1)
+  rubocop-performance (~> 1.26.1)
   rubocop-rails (~> 2.29.1)
   rubocop-rspec (~> 3.7.0)
   rubocop-rspec_rails (~> 2.30.0)