chore(deps): update selenium-webdriver requirement from ~> 4.2, < 4.15 to ~> 4.2, < 4.16 (#507)

Updates the requirements on [selenium-webdriver](https://github.com/SeleniumHQ/selenium) to permit the latest version.
- [Release notes](https://github.com/SeleniumHQ/selenium/releases)
- [Changelog](https://github.com/SeleniumHQ/selenium/blob/trunk/rb/CHANGES)
- [Commits](SeleniumHQ/selenium@selenium-4.2.0...selenium-4.15.0)

---
updated-dependencies:
- dependency-name: selenium-webdriver
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

appium_lib_core.gemspec

@@ -22,7 +22,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.add_runtime_dependency 'selenium-webdriver', '~> 4.2', '< 4.15'
+  spec.add_runtime_dependency 'selenium-webdriver', '~> 4.2', '< 4.16'
   spec.add_runtime_dependency 'faye-websocket', '~> 0.11.0'
 
   spec.add_development_dependency 'rake', '~> 13.0'