Update main branch documentation

[cmsis] / main / General / footer.js

function writeHeader() {
    document.write('Version 6.0.0-dev71');
};

function writeFooter()  {
    document.write('Generated on Mi Nov  8 2023 16:26:36 for CMSIS 6.0.0-dev71+g4f4f3b5. Copyright © 2023 Arm Limited (or its affiliates). All rights reserved.');
};