[TASK][DOC] Special symbols require extra fonts

In order to render PDF with special symbols such as ⏎ (present in the Flow
documentation), extra fonts for LaTeX needs to be installed.

Change-Id: Ib18d9ddba1dea6fda3ea16f4c082c7ad7a44a6c1
Resolves: #55092
Related: #55240
Reviewed-on: https://review.typo3.org/26892
Reviewed-by: Xavier Perseguers
Tested-by: Xavier Perseguers