* Updated Cheatsheets with New sources

2 Links added.
1. C++ - Cheatsheet Greg Book 2002
2. MongoDB codecentric Cheatsheet

* Updated Commit - alphabetical order

* Updated and corrected space as per Guidelines

* Rollbacked incorrect Space Mistake

* Removed C++ cheatsheet, for which proper attribution source not available

* use correct title
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: NEric Hellman <eric@hellman.net>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>