Align with root OV script

Author: Maxim-Doronin

demos/CMakeLists.txt

@@ -2,7 +2,11 @@
 # SPDX-License-Identifier: Apache-2.0
 #
 
-cmake_minimum_required(VERSION 3.15)
+if(WIN32)
+    cmake_minimum_required(VERSION 3.16)
+else()
+    cmake_minimum_required(VERSION 3.13)
+endif()
 
 # Multi config generators such as Visual Studio ignore CMAKE_BUILD_TYPE. Multi config generators are configured with
 # CMAKE_CONFIGURATION_TYPES, but limiting options in it completely removes such build options