Bump activeadmin from 4.0.0.beta18 to 4.0.0.beta19

Bumps [activeadmin](https://github.com/activeadmin/activeadmin) from 4.0.0.beta18 to 4.0.0.beta19.
- [Release notes](https://github.com/activeadmin/activeadmin/releases)
- [Changelog](https://github.com/activeadmin/activeadmin/blob/master/CHANGELOG.md)
- [Commits](activeadmin/activeadmin@v4.0.0.beta18...v4.0.0.beta19)

---
updated-dependencies:
- dependency-name: activeadmin
  dependency-version: 4.0.0.beta19
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Gemfile

@@ -43,7 +43,7 @@ gem 'bootstrap', '~> 5.3', '>= 5.3.2'
 gem 'dartsass-rails', '~> 0.5.0'
 gem 'dartsass-sprockets', '~> 3.1'
 gem 'simple_form'
-gem 'activeadmin', "4.0.0.beta18"
+gem 'activeadmin', "4.0.0.beta19"
 gem 'base64'
 gem 'redcarpet'
 gem 'rails_autolink'

Gemfile.lock

@@ -54,7 +54,7 @@ GEM
       erubi (~> 1.11)
       rails-dom-testing (~> 2.2)
       rails-html-sanitizer (~> 1.6)
-    activeadmin (4.0.0.beta18)
+    activeadmin (4.0.0.beta19)
       arbre (~> 2.0)
       csv
       formtastic (>= 5.0)
@@ -222,7 +222,7 @@ GEM
       mime-types-data (~> 3.2025, >= 3.2025.0507)
     mime-types-data (3.2025.0924)
     mini_mime (1.1.5)
-    minitest (5.26.1)
+    minitest (5.26.2)
     msgpack (1.8.0)
     net-imap (0.5.12)
       date
@@ -383,7 +383,7 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
-  activeadmin (= 4.0.0.beta18)
+  activeadmin (= 4.0.0.beta19)
   altcha-rails
   base64
   bootsnap