Bump graphql from 2.4.13 to 2.5.8

Bumps [graphql](https://github.com/rmosolgo/graphql-ruby) from 2.4.13 to 2.5.8.
- [Release notes](https://github.com/rmosolgo/graphql-ruby/releases)
- [Changelog](https://github.com/rmosolgo/graphql-ruby/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rmosolgo/graphql-ruby/compare/v2.4.13...v2.5.8)

---
updated-dependencies:
- dependency-name: graphql
  dependency-version: 2.5.8
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile

@@ -28,7 +28,7 @@ gem "font-awesome-sass", "~> 5.15.1" # Remember to update vendor/assets/images/f
 gem "globalize", "~> 7.0.0"
 gem "globalize-accessors", "~> 0.3.0"
 gem "graphiql-rails", "~> 1.8.0"
-gem "graphql", "~> 2.4.13"
+gem "graphql", "~> 2.5.9"
 gem "groupdate", "~> 6.7.0"
 gem "image_processing", "~> 1.14.0"
 gem "invisible_captcha", "~> 2.3.0"