Purpose
=======
This commit changes a conversion variable
`RATING_LIMIT_SATISFIED` in order to follow a new conversion:
> 5/4 := Satisfied
> 3 := Okay
> 2/1 := Dissatisfied
Specifications
==============
This commit only changes the variable in order to limit the
modifications made to the `rating` module/models.
This is done in order to change the faces displayed for each review/rating
without impacting the statistics. The ratings/reviews will have the same values
as before but will only get a different conversion if higher than 4.
task-2597345
See odoo/enterprise#20480
See odoo/upgrade#2784
Part-of: odoo/odoo#75646