pagrubel for 2023-11-12-sc: Update presentations by 2023-10-20

[bernhold]

• [x] "Update https://github.com/bssw-tutorial/presentations/blob/master/collaborative-sw-dev.pptx by 2023-10-20"
• [x] "Update https://github.com/bssw-tutorial/presentations/blob/master/intro.pptx by 2023-10-20"
• [x] "Update https://github.com/bssw-tutorial/presentations/blob/master/overview.pptx by 2023-10-20"
• [x] "Remember to update <https://github.com/bssw-tutorial/presentations/blob/master/presentations.yml if any titles change!"

[pagrubel]

Done! No real significant changes needed. Did some minor ones.