Update README.md

[Elisa-on-GitHub]

I'm adding this section and a few lines to create the opportunity for an exercise for those who aren't too familiar with GitHub. Will remove again after the session on 12 November.

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Summary

Status	Count
🔍 Total	404
✅ Successful	329
⏳ Timeouts	0
🔀 Redirected	0
👻 Excluded	73
❓ Unknown	0
🚫 Errors	2

Errors per input

Errors in topics/data-collection.qmd

• [ERR] https://www.protocol-online.org/ | Failed: Network error: error sending request for url (https://www.protocol-online.org/)

Errors in topics/qualtrics.qmd

• [403] https://basecamp.qualtrics.com/ | Failed: Network error: Forbidden Full Github Actions output