[BUGFIX] Change documentation of [BE][interfaces]

The order of the options given is irrelevant as
they will always be rendered in the same order.

The documentation was updated to reflect that fact.

Change-Id: I409e8a26a3b1186a12761cbb84a4f6afe94b464b
Resolves: #82431
Releases: master, 8.7
Reviewed-on: https://review.typo3.org/55478


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Alexander Opitz <opitz.alexander@googlemail.com>
Tested-by: Alexander Opitz <opitz.alexander@googlemail.com>