Bump bullet from 5.9.0 to 6.0.0 (mastodon#10635)

Bumps [bullet](https://github.com/flyerhzm/bullet) from 5.9.0 to 6.0.0.
- [Release notes](https://github.com/flyerhzm/bullet/releases)
- [Changelog](https://github.com/flyerhzm/bullet/blob/master/CHANGELOG.md)
- [Commits](flyerhzm/bullet@5.9.0...6.0.0)

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

Gemfile

@@ -124,7 +124,7 @@ group :development do
   gem 'annotate', '~> 2.7'
   gem 'better_errors', '~> 2.5'
   gem 'binding_of_caller', '~> 0.7'
-  gem 'bullet', '~> 5.9'
+  gem 'bullet', '~> 6.0'
   gem 'letter_opener', '~> 1.7'
   gem 'letter_opener_web', '~> 1.3'
   gem 'memory_profiler'

Gemfile.lock

@@ -106,7 +106,7 @@ GEM
     brakeman (4.5.0)
     browser (2.5.3)
     builder (3.2.3)
-    bullet (5.9.0)
+    bullet (6.0.0)
       activesupport (>= 3.0.0)
       uniform_notifier (~> 1.11)
     bundler-audit (0.6.1)
@@ -665,7 +665,7 @@ DEPENDENCIES
   bootsnap (~> 1.4)
   brakeman (~> 4.5)
   browser
-  bullet (~> 5.9)
+  bullet (~> 6.0)
   bundler-audit (~> 0.6)
   capistrano (~> 3.11)
   capistrano-rails (~> 1.4)