update generator minimum cmake version

Author: scotthart

generator/internal/scaffold_generator.cc

@@ -1019,7 +1019,7 @@ void GenerateQuickstartCMake(
 # This file shows how to use the $title$ C++ client library from a larger
 # CMake project.
 
-cmake_minimum_required(VERSION 3.10...3.24)
+cmake_minimum_required(VERSION 3.22...3.31)
 project(google-cloud-cpp-$library$-quickstart CXX)
 
 find_package(google_cloud_cpp_$library$ REQUIRED)