Fix the typo on the `filter_assginee_no_assigne` key used in
translations.
The typo itself doesn't produce a bug (as it's there both on the code
and on the locales)
Side Note: Github UI is not the best to bulk change this :/ Squashing
commits on the PR should be adequate.
Closes#34076 .
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Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>