build(deps): bump multi_xml from 0.6.0 to 0.7.0 in the bundler group

Bumps the bundler group with 1 update: [multi_xml](https://github.com/sferik/multi_xml).


Updates `multi_xml` from 0.6.0 to 0.7.0
- [Changelog](https://github.com/sferik/multi_xml/blob/master/CHANGELOG.md)
- [Commits](sferik/multi_xml@v0.6.0...v0.7.0)

---
updated-dependencies:
- dependency-name: multi_xml
  dependency-type: indirect
  update-type: version-update:semver-minor
  dependency-group: bundler
...

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

Gemfile.lock

@@ -54,7 +54,8 @@ GEM
     lumberjack (1.2.10)
     method_source (1.1.0)
     minitest (5.22.3)
-    multi_xml (0.6.0)
+    multi_xml (0.7.0)
+      bigdecimal (~> 3.1)
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     mutex_m (0.2.0)