Improvement description

Suggestion to remove the space between the value and the unit.
It looks unnecessary because the space can be added by updating the translation.

Our project's needs are that in some locales there is space and in some there isn't.

The change:

-            $value .= ' ' . $translator->trans($this->getUnit()->getAbbreviation(), [], 'admin');
+            $value .= $translator->trans($this->getUnit()->getAbbreviation(), [], 'admin');

Ref: https://github.com/pimcore/pimcore/blob/12.x/models/DataObject/Data/QuantityValue.php#L63