Bump proformaxml from 1.2.0 to 1.3.0

Bumps [proformaxml](https://github.com/openHPI/proformaxml) from 1.2.0 to 1.3.0.
- [Release notes](https://github.com/openHPI/proformaxml/releases)
- [Commits](https://github.com/openHPI/proformaxml/compare/v1.2.0...v1.3.0)

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

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

Gemfile.lock

@@ -298,7 +298,7 @@ GEM
       ast (~> 2.4.1)
       racc
     pg (1.5.6)
-    proformaxml (1.2.0)
+    proformaxml (1.3.0)
       activemodel (>= 5.2.3, < 8.0.0)
       activesupport (>= 5.2.3, < 8.0.0)
       dachsfisch (~> 1.0.0)
@@ -613,7 +613,7 @@ DEPENDENCIES
   nokogiri
   pagedown-bootstrap-rails
   pg
-  proformaxml (~> 1.2.0)
+  proformaxml (~> 1.3.0)
   prometheus_exporter
   pry-byebug
   pry-rails