Update Puma to 4.3.3

- https://gitlab.com/gitlab-org/gitlab-puma/-/compare/v4.3.1.gitlab.2...v4.3.3.gitlab.2
- Fixes CVE-2020-5247

Gemfile

@@ -171,7 +171,7 @@ group :unicorn do
 end
 
 group :puma do
-  gem 'gitlab-puma', '~> 4.3.1.gitlab.2', require: false
+  gem 'gitlab-puma', '~> 4.3.3.gitlab.2', require: false
   gem 'gitlab-puma_worker_killer', '~> 0.1.1.gitlab.1', require: false
   gem 'rack-timeout', require: false
 end

Gemfile.lock

@@ -391,7 +391,7 @@ GEM
     gitlab-mail_room (0.0.3)
     gitlab-markup (1.7.0)
     gitlab-net-dns (0.9.1)
-    gitlab-puma (4.3.1.gitlab.2)
+    gitlab-puma (4.3.3.gitlab.2)
       nio4r (~> 2.0)
     gitlab-puma_worker_killer (0.1.1.gitlab.1)
       get_process_mem (~> 0.2)
@@ -1237,7 +1237,7 @@ DEPENDENCIES
   gitlab-mail_room (~> 0.0.3)
   gitlab-markup (~> 1.7.0)
   gitlab-net-dns (~> 0.9.1)
-  gitlab-puma (~> 4.3.1.gitlab.2)
+  gitlab-puma (~> 4.3.3.gitlab.2)
   gitlab-puma_worker_killer (~> 0.1.1.gitlab.1)
   gitlab-sidekiq-fetcher (= 0.5.2)
   gitlab-styles (~> 3.1.0)

changelogs/unreleased/update-puma-to-4-3-3.yml

+---
+title: Update Puma to 4.3.3
+merge_request: 27232
+author:
+type: security