minor #8526 Fix a small typo error (number.rst) (Dededede4)

This PR was submitted for the master branch but it was merged into the 2.7 branch instead (closes #8526).

Discussion
----------

 Fix a small typo error (number.rst)

Commits
-------

0955bc6  Fix a small typo error (number.rst)

Author: xabbuh

reference/forms/types/number.rst

@@ -47,7 +47,7 @@ Field Options
 rounding_mode
 ~~~~~~~~~~~~~
 
-**type**: ``integer`` **default**: ``NumberToLocalizedStringTransformer::ROUND_HALFUP``
+**type**: ``integer`` **default**: ``NumberToLocalizedStringTransformer::ROUND_HALF_UP``
 
 If a submitted number needs to be rounded (based on the `scale`_
 option), you have several configurable options for that rounding. Each