Fix 1 rubocop violations for Gemspec/DeprecatedAttributeAssignment
requested to merge gitlab--housekeeper--keeps--rubocop-fixer--gemspec--deprecated-attribute-assignment-spec-fixtures-packages-rubygems-package-gemspec into master
Fixes the Gemspec/DeprecatedAttributeAssignment violations for the first 20 that are excluded.
This was generated by an in-progress Keep being implemented in !144421 (merged)
This change was generated by gitlab-housekeeper