Bump proformaxml from 1.3.0 to 1.4.0

Bumps [proformaxml](https://github.com/openHPI/proformaxml) from 1.3.0 to 1.4.0.
- [Release notes](https://github.com/openHPI/proformaxml/releases)
- [Commits](https://github.com/openHPI/proformaxml/compare/v1.3.0...v1.4.0)

---
updated-dependencies:
- dependency-name: proformaxml
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile

@@ -33,7 +33,7 @@ gem 'net-pop', require: false
 gem 'net-smtp', require: false
 gem 'nokogiri'
 gem 'pg'
-gem 'proformaxml', '~> 1.3.0'
+gem 'proformaxml', '~> 1.4.0'
 gem 'prometheus_exporter'
 gem 'puma'
 gem 'pundit'

Gemfile.lock

@@ -260,7 +260,7 @@ GEM
     mini_magick (4.13.1)
     mini_mime (1.1.5)
     mini_portile2 (2.8.7)
-    minitest (5.23.1)
+    minitest (5.24.0)
     mnemosyne-ruby (2.0.0)
       activesupport (>= 6.1)
       bunny
@@ -306,7 +306,7 @@ GEM
       ast (~> 2.4.1)
       racc
     pg (1.5.6)
-    proformaxml (1.3.0)
+    proformaxml (1.4.0)
       activemodel (>= 5.2.3, < 8.0.0)
       activesupport (>= 5.2.3, < 8.0.0)
       dachsfisch (~> 1.0.0)
@@ -619,7 +619,7 @@ DEPENDENCIES
   net-smtp
   nokogiri
   pg
-  proformaxml (~> 1.3.0)
+  proformaxml (~> 1.4.0)
   prometheus_exporter
   pry-byebug
   pry-rails