Maintenance: Update dependency keycloak-admin URL.

Gemfile

@@ -254,8 +254,7 @@ group :development, :test do
   gem 'localhost'
 
   # Keycloak admin tool for setting up SAML auth tests
-  gem 'httparty'
-  gem 'keycloak-admin', git: 'https://github.com/tschaefer/ruby-keycloak-admin/', branch: 'develop', require: false
+  gem 'keycloak-admin', git: 'https://github.com/tschaefer/ruby-keycloak-admin/', branch: 'main', require: false
 end
 
 # To permanently extend Zammad with additional gems, you can specify them in Gemfile.local.

Gemfile.lock

@@ -1,9 +1,10 @@
 GIT
   remote: https://github.com/tschaefer/ruby-keycloak-admin/
-  revision: 766702927ae9f2316f4468f8774dc7c018419b16
-  branch: develop
+  revision: 037ac274541d513f3edc3df74bc684ff23ecc473
+  branch: main
   specs:
-    keycloak-admin (20.0.3)
+    keycloak-admin (22.0.4)
+      httparty (~> 0.21.0)
 
 GIT
   remote: https://github.com/zammad-deps/autodiscover
@@ -740,7 +741,6 @@ DEPENDENCIES
   graphql-batch
   hiredis
   htmlentities
-  httparty
   icalendar
   icalendar-recurrence
   json