Merge pull request #754 from jrafanie/allow_rails_7_versions_only

Use core minimum but allow 7.0/7.1/7.2 since core sets upper limit

manageiq-schema.gemspec

@@ -23,7 +23,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency "manageiq-password",       ">= 1.2.0", "< 2"
   spec.add_dependency "more_core_extensions",    ">= 3.5", "< 5"
   spec.add_dependency "pg"
-  spec.add_dependency "rails",                   ">=6.0.4", "<7.1"
+  spec.add_dependency "rails",                   ">=7.0.8", "<8.0"
 
   spec.add_development_dependency "manageiq-style", ">= 1.5.2"
   spec.add_development_dependency "rspec"