fix fail_on_error input

[Doarakko]

Fixed it.
#64

When fail_on_error is true and golangci-lint is failed, job is not failed.

reproduce

• reviewdog.yml

name: reviewdog
on: [pull_request]
jobs:
  golangci-lint:
    name: runner / golangci-lint
    runs-on: ubuntu-latest
    steps:
      - name: Check out code into the Go module directory
        uses: actions/checkout@v2

      # optionally use a specific version of Go rather than the default one
      - name: Set up Go
        uses: actions/setup-go@v2
        with:
          go-version: "1.16"

      - name: golangci-lint
        uses: reviewdog/action-golangci-lint@v1.20.0
        with:
          workdir: testdata/
          github_token: ${{ github.token }}
          reporter: "github-pr-review"
          fail_on_error: true

If you would like, I create an issue that lists other repositories that need to fix, and I will fix them one by one.
https://github.com/reviewdog/reviewdog#public-reviewdog-github-actions

[haya14busa]

Thanks!

If you would like, I create an issue that lists other repositories that need to fix, and I will fix them one by one.

That would be great!

[review-dog]

Hi, @Doarakko! We merged your PR to reviewdog! 🐶
Thank you for your contribution! ✨

We just invited you to join the @reviewdog organization on GitHub.
Accept the invite by visiting https://github.com/orgs/reviewdog/invitation.
By joining the team, you'll be a part of reviewdog community and can help the maintainance of reviewdog.

Thanks again!

[github-actions]

🚀 [bumpr] Bumped! New version:v1.21.1 Changes:v1.21.0...v1.21.1

[Doarakko]

Thank you for your review and invitation!

I have created an issue and would like to fix it.
reviewdog/reviewdog#949