DOCS: Added links to official docs in cheat sheets
- [x] closes #39706
- [x] tests added / passed (not necessary, only edited ppt and pdf)
- [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them (not necessary, only edited ppt and pdf)
- [x] whatsnew entry (not necesarry)
