RTE: &nbsp; in the tables with <ol> or <ul>

# Bug Report

## Prerequisites

* [x] Can you reproduce the problem on TYPO3 v11.5 LTS
* [ ] Can you reproduce the problem on TYPO3 v12.4 LTS (not tested but should be the same)
* [x] Did you [perform a cursory search](https://github.com/issues?q=is%3Aissue+user%3Abenjaminkott+repo%3Abenjaminkott%2Fbootstrap_package)
to see if your bug or enhancement is already reported?

## Description

It's the same bug as EXT:fluid_styled_content had before TYPO3 v10 and that is described [here](https://forge.typo3.org/issues/83795). The solution in [comment 25](https://forge.typo3.org/issues/83795#note-25) is working here also and should be added.

## Steps to Reproduce

1. Create text CE
2. Add a table in RTE
3. Add a list in a table cell
4. Check source code in frontend

### Expected behavior

The follwing HTML code is expected:
`

• foo

### Actual behavior

This HTML code is created:
` 

• foo

## Versions

v14.0.7