docs: Fix metadata on rubygems.org

CHANGELOG.md

@@ -5,6 +5,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 
+## [Unreleased]
+### Fixed
+* Fix metadata displayed on RubyGems.org for this library.
+
 ## [3.0.1] - 2024-09-23
 ### Fixed
 * `document.translate_document` required a filename, this is now optional. The example in the README now works.
@@ -34,6 +38,7 @@ The change in major version is only due to the change in maintainership, there i
 * Make RequestEntityTooLarge error message more clear
 
 
+[Unreleased]: https://github.com/DeepLcom/deepl-rb/compare/v3.0.1...HEAD
 [3.0.1]: https://github.com/DeepLcom/deepl-rb/compare/v3.0.0...v3.0.1
 [3.0.0]: https://github.com/DeepLcom/deepl-rb/compare/v2.5.3...v3.0.0
 [2.5.3]: https://github.com/DeepLcom/deepl-rb/compare/v2.5.2...v2.5.3

Rakefile

@@ -25,6 +25,12 @@ Juwelier::Tasks.new do |gem|
 
   gem.email = 'open-source@deepl.com'
   gem.authors = ['DeepL SE']
+  gem.metadata = {
+    'bug_tracker_uri' => 'https://github.com/DeepLcom/deepl-rb/issues',
+    'changelog_uri' => 'https://github.com/DeepLcom/deepl-rb/blob/main/CHANGELOG.md',
+    'documentation_uri' => 'https://github.com/DeepLcom/deepl-rb/blob/main/README.md',
+    'homepage_uri' => 'https://github.com/DeepLcom/deepl-rb'
+  }
   gem.files.exclude '.github'
   gem.files.exclude '.circleci'
 end