Update: [Secure Product Design] Merge proposed Secure Design Principles Cheat Sheet and update

[dsmhood]

What is missing or needs to be updated?

The Secure Product Design Cheat Sheet is a good start at describing how to incorporate some secure design principles into the design process and even lists out some secure design principles. The proposed Secure Design Principles Cheat Sheet (https://github.com/OWASP/CheatSheetSeries/issues/723) has a better list of secure design principles.

How should this be resolved?

Merge the proposed Secure Design Principles Cheat Sheet (https://github.com/OWASP/CheatSheetSeries/issues/723) into the existing Secure Product Design Cheat Sheet