bpo-36260: Add pitfalls to zipfile module documentation (GH-13378) (GH-15976)

bpo-36260: Add pitfalls to zipfile module documentation (GH-13378) (GH-15976)

* bpo-36260: Add pitfalls to zipfile module documentation

We saw vulnerability warning description (including zip bomb) in Doc/library/xml.rst file.
This gave us the idea of documentation improvement.

So, we moved a little bit forward :P
And the doc patch can be found (pr).

* fix trailing whitespace

* 📜🤖 Added by blurb_it.

* Reformat text for consistency.
(cherry picked from commit 3ba51d587f6897a45301ce9126300c14fcd4eba2)

Co-authored-by: JunWei Song <sungboss2004@gmail.com>