Bump rubocop from 0.70.0 to 0.71.0 (#10901)

Bumps [rubocop](https://github.com/rubocop-hq/rubocop) from 0.70.0 to 0.71.0.
- [Release notes](https://github.com/rubocop-hq/rubocop/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop-hq/rubocop/compare/v0.70.0...v0.71.0)

Gemfile

@@ -129,7 +129,7 @@ group :development do
   gem 'letter_opener', '~> 1.7'
   gem 'letter_opener_web', '~> 1.3'
   gem 'memory_profiler'
-  gem 'rubocop', '~> 0.70', require: false
+  gem 'rubocop', '~> 0.71', require: false
   gem 'brakeman', '~> 4.5', require: false
   gem 'bundler-audit', '~> 0.6', require: false
   gem 'scss_lint', '~> 0.58', require: false

Gemfile.lock

@@ -524,7 +524,7 @@ GEM
       rspec-core (~> 3.0, >= 3.0.0)
       sidekiq (>= 2.4.0)
     rspec-support (3.8.0)
-    rubocop (0.70.0)
+    rubocop (0.71.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
       parser (>= 2.6)
@@ -533,7 +533,7 @@ GEM
       unicode-display_width (>= 1.4.0, < 1.7)
     ruby-bbcode (2.1.0)
       activesupport (>= 4.2.2)
-    ruby-progressbar (1.10.0)
+    ruby-progressbar (1.10.1)
     ruby-saml (1.9.0)
       nokogiri (>= 1.5.10)
     rufus-scheduler (3.5.2)
@@ -746,7 +746,7 @@ DEPENDENCIES
   rqrcode (~> 0.10)
   rspec-rails (~> 3.8)
   rspec-sidekiq (~> 3.0)
-  rubocop (~> 0.70)
+  rubocop (~> 0.71)
   ruby-bbcode (~> 2.0)
   sanitize (~> 5.0)
   scss_lint (~> 0.58)