Bump doorkeeper from 4.3.2 to 4.4.0

Bumps [doorkeeper](https://github.com/doorkeeper-gem/doorkeeper) from 4.3.2 to 4.4.0.
- [Release notes](https://github.com/doorkeeper-gem/doorkeeper/releases)
- [Changelog](https://github.com/doorkeeper-gem/doorkeeper/blob/main/CHANGELOG.md)
- [Commits](doorkeeper-gem/doorkeeper@v4.3.2...v4.4.0)

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

Gemfile

@@ -47,7 +47,7 @@ end
 
 # gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
 gem 'devise', '= 4.4.3'
-gem 'doorkeeper', '= 4.3.2'
+gem 'doorkeeper', '4.4.0'
 gem 'cancancan'
 
 gem 'bootstrap-sass', '= 3.4.1'

Gemfile.lock

@@ -159,7 +159,7 @@ GEM
       warden (~> 1.2.3)
     domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)
-    doorkeeper (4.3.2)
+    doorkeeper (4.4.0)
       railties (>= 4.2)
     down (5.3.1)
       addressable (~> 2.8)
@@ -607,7 +607,7 @@ DEPENDENCIES
   commonmarker (~> 0.17.11)
   csl-styles
   devise (= 4.4.3)
-  doorkeeper (= 4.3.2)
+  doorkeeper (= 4.4.0)
   down
   exiftool_vendored
   fastimage