feat: Update Ruby version to 3.1+

docs: Update README and broken URL

Author: yoshi-automation

google-cloud-bigquery/README.md

@@ -70,7 +70,7 @@ Google::Apis.logger = my_logger
 
 ## Supported Ruby Versions
 
-This library is supported on Ruby 3.0+.
+This library is supported on Ruby 3.1+.
 
 Google provides official support for Ruby versions that are actively supported
 by Ruby Core—that is, Ruby versions that are either in normal maintenance or

google-cloud-bigquery/google-cloud-bigquery.gemspec

@@ -16,7 +16,7 @@ Gem::Specification.new do |gem|
                        "CHANGELOG.md", "CODE_OF_CONDUCT.md", "LICENSE", ".yardopts"]
   gem.require_paths = ["lib"]
 
-  gem.required_ruby_version = ">= 3.0"
+  gem.required_ruby_version = ">= 3.1"
 
   gem.add_dependency "bigdecimal", "~> 3.0"
   gem.add_dependency "concurrent-ruby", "~> 1.0"