Update google_search_results requirement from ~> 2.0.0 to ~> 2.2.0 (#834)

Updates the requirements on [google_search_results](https://github.com/serpapi/google-search-results-ruby) to permit the latest version.
- [Release notes](https://github.com/serpapi/google-search-results-ruby/releases)
- [Commits](https://github.com/serpapi/google-search-results-ruby/commits)

---
updated-dependencies:
- dependency-name: google_search_results
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

langchain.gemspec

@@ -53,7 +53,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "eqn", "~> 1.6.5"
   spec.add_development_dependency "faraday"
   spec.add_development_dependency "googleauth"
-  spec.add_development_dependency "google_search_results", "~> 2.0.0"
+  spec.add_development_dependency "google_search_results", "~> 2.2.0"
   spec.add_development_dependency "hnswlib", "~> 0.8.1"
   spec.add_development_dependency "hugging-face", "~> 0.3.4"
   spec.add_development_dependency "milvus", "~> 0.10.3"