adubey64 for 2023-08-01-noaa: Update presentations by 2023-07-26

[bernhold]

• [ ] "Update https://github.com/bssw-tutorial/presentations/blob/master/computational-expts.pptx by 2023-07-26"
• [ ] "Update https://github.com/bssw-tutorial/presentations/blob/master/design-a.pptx by 2023-07-26"
• [ ] "Update https://github.com/bssw-tutorial/presentations/blob/master/refactoring.pptx by 2023-07-26"
• [ ] "Update https://github.com/bssw-tutorial/presentations/blob/master/testing-a.pptx by 2023-07-26"
• [ ] "Remember to update <https://github.com/bssw-tutorial/presentations/blob/master/presentations.yml if any titles change!"

[bernhold]

@adubey64 please also see #144

[adubey64]

Done.