fix blank error message when allow_blank is false and value is blank #316

	name: RuboCop

	on: [push, pull_request]

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Set up Ruby 3.2
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: 3.2
	bundler-cache: true

	- name: Run rubocop
	run: bundle exec rubocop --config .rubocop.yml

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