fix: Fail the action if there are errors

[Jason3S]

fixes #1897

Note: this is difficult to have a test that guarantees that it will fail, because there is no way to write a workflow to test it 100%.

[coveralls]

Pull Request Test Coverage Report for Build 10354687834

Details

• 2 of 3 (66.67%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.4%) to 93.12%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
action-src/src/action.ts	2	3	66.67%
<!--	Total:	2	3	66.67%	-->

Totals
Change from base Build 10354630121:	-0.4%
Covered Lines:	249
Relevant Lines:	259

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💛 - Coveralls