[DOC] Use integers for examples of saveAndClose configuration

The string "false" is cast to true and therefore 0/1 must be used in
examples.

Resolves: #99211
Releases: main, 12.4, 11.5
Change-Id: I5519cd1917b81c1dbb90fbb6746541735e4940ce
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/84633


Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: core-ci <typo3@b13.com>