Bump doorkeeper from 5.2.2 to 5.2.3 (#12630)

Bumps [doorkeeper](https://github.com/doorkeeper-gem/doorkeeper) from 5.2.2 to 5.2.3.
- [Release notes](https://github.com/doorkeeper-gem/doorkeeper/releases)
- [Changelog](https://github.com/doorkeeper-gem/doorkeeper/blob/master/CHANGELOG.md)
- [Commits](https://github.com/doorkeeper-gem/doorkeeper/compare/v5.2.2...v5.2.3)

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

Gemfile.lock

@@ -134,7 +134,7 @@ GEM
       msgpack (~> 1.0)
     brakeman (4.7.2)
     browser (2.7.1)
-    builder (3.2.3)
+    builder (3.2.4)
     bullet (6.0.2)
       activesupport (>= 3.0.0)
       uniform_notifier (~> 1.11)
@@ -218,7 +218,7 @@ GEM
     docile (1.3.2)
     domain_name (0.5.20180417)
       unf (>= 0.0.5, < 1.0.0)
-    doorkeeper (5.2.2)
+    doorkeeper (5.2.3)
       railties (>= 5)
     dotenv (2.7.5)
     dotenv-rails (2.7.5)
@@ -356,7 +356,7 @@ GEM
       activesupport (>= 4)
       railties (>= 4)
       request_store (~> 1.0)
-    loofah (2.3.1)
+    loofah (2.4.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.1)