Update microsoft_kiota_abstractions requirement from ~> 0.14.0 to >= 0.14, < 0.16

Updates the requirements on [microsoft_kiota_abstractions](https://github.com/microsoft/kiota-abstractions-ruby) to permit the latest version.
- [Release notes](https://github.com/microsoft/kiota-abstractions-ruby/releases)
- [Changelog](https://github.com/microsoft/kiota-abstractions-ruby/blob/main/CHANGELOG.md)
- [Commits](microsoft/kiota-abstractions-ruby@v0.14.0...v0.15.0)

---
updated-dependencies:
- dependency-name: microsoft_kiota_abstractions
  dependency-version: 0.15.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

microsoft_kiota_faraday.gemspec

@@ -28,7 +28,7 @@ Gem::Specification.new do |spec|
   spec.bindir        = 'bin'
   spec.executables   = spec.files.grep(%r{\Aexe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
-  spec.add_runtime_dependency 'microsoft_kiota_abstractions', '~> 0.14.0'
+  spec.add_runtime_dependency 'microsoft_kiota_abstractions', '>= 0.14', '< 0.16'
   spec.add_runtime_dependency 'faraday', '~> 2.7', '>= 2.7.2'
   spec.add_development_dependency 'rake', '~> 13.0'
   spec.add_development_dependency 'rspec', '~> 3.0'