Revert minimum version of bare_bones_cmake example back to 3.5 to match other examples

Author: zachcran

tests/docs/bare_bones_cmake/CMakeLists.txt

@@ -15,7 +15,7 @@
 # Minimum version required as of CMake 4.0
 # (see https://cmake.org/cmake/help/latest/policy/CMP0000.html).
 # Match this with minimum version from 'CMaize/CMakeLists.txt'.
-cmake_minimum_required(VERSION 3.19)
+cmake_minimum_required(VERSION 3.5)  # Required as of CMake 4.0
 
 add_executable(hello_world hello_world.cpp)