update gemspec to be more accurate for modern ceedling.

ceedling.gemspec

@@ -10,11 +10,13 @@ Gem::Specification.new do |s|
   s.authors     = ["Mark VanderVoord", "Michael Karlesky", "Greg Williams"]
   s.email       = ["[email protected]", "[email protected]", "[email protected]"]
   s.homepage    = "http://throwtheswitch.org/ceedling"
-  s.summary     = "Ceedling is a build automation tool for C unit test suites that packages up Unity, CMock, and Rake-based build management functionality"
+  s.summary     = "Ceedling is a build automation tool for C unit tests and releases. It's a member of the ThrowTheSwitch.org family of tools. It's built upon Unity and CMock."
   s.description = <<-DESC
 Ceedling is a build automation tool that helps you create and run C unit test suites.
 
-Ceedling provides two core functions: [1] It packages up several tools including the C unit test framework Unity, the Ruby-based mock generation tool CMock, and a C exception library CException. [2] It extends Rake with functionality specific to generating, building, and executing C test suites.
+Ceedling provides two core functions: 
+  [1] It packages up several tools including the C unit test framework Unity, the mock generation tool CMock, and other features. 
+  [2] It simplifies tool configuration for embedded or native C toolchains and automates the running and reporting of tests.
 
 Ceedling projects are created with a YAML configuration file. A variety of conventions within the tool simplify generating mocks from C files and assembling suites of unit test functions.
   DESC
@@ -28,7 +30,7 @@ Ceedling projects are created with a YAML configuration file. A variety of conve
     "source_code_uri"   => "https://github.com/ThrowTheSwitch/Ceedling"
   }
 
-  s.required_ruby_version = ">= 2.7.0"
+  s.required_ruby_version = ">= 3.0.0"
 
   s.add_dependency "thor", ">= 0.14"
   s.add_dependency "rake", ">= 12", "< 14"