Final Review for chapter 4

Adding the changes that came from the final review during Chapter 4 meeting. During the call and the next two weeks, the changes were included using [this doc](https://github.com/todogroup/ospology/edit/main/ospo-book/content/en/04-chapter.md)for chapter intro and this doc for [activity table](https://drive.google.com/open?id=12wqqdCLgkTIor_onHvhCtLPE-Tsn44k2oWVxnisb6TM&authuser=0)

Contributors in this PR:

- Alice Sowerby
- Cornelius Schumacher
- Gergely Csatari
- Ana Jiménez

These people are already acknowledged in the OSPO Book contributors section.

Thank you!


Signed-off-by: Ana Jimenez Santamaria <[email protected]>

ospo-book/content/en/04-chapter.md

@@ -1,5 +1,5 @@
 ---
-title: "A Deep Dive into Day-to-Day Operations"
+title: "4 - Day-to-Day Operations"
 status: Completed
 weight: 60
 ---