Update google-cloud-env requirement from ~> 1.2 to >= 1.2, < 3.0

Updates the requirements on [google-cloud-env](https://github.com/googleapis/ruby-cloud-env) to permit the latest version.
- [Release notes](https://github.com/googleapis/ruby-cloud-env/releases)
- [Changelog](https://github.com/googleapis/ruby-cloud-env/blob/main/CHANGELOG.md)
- [Commits](googleapis/ruby-cloud-env@google-cloud-env/v1.5.0...google-cloud-env/v2.0.1)

---
updated-dependencies:
- dependency-name: google-cloud-env
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

fog-google.gemspec

@@ -32,7 +32,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency "google-apis-pubsub_v1", "~> 0.30"
   spec.add_dependency "google-apis-sqladmin_v1beta4", "~> 0.38"
 
-  spec.add_dependency "google-cloud-env", "~> 1.2"
+  spec.add_dependency "google-cloud-env", ">= 1.2", "< 3.0"
 
   spec.add_dependency "addressable", ">= 2.7.0"