feat: add install-shellcheck action #3

Can't find 'action.yml', 'action.yaml' or 'Dockerfile' under '/Users/runner/work/wdl/wdl/.github/actions/install-shellcheck'. Did you forget to run actions/checkout before running your local action?

arena (ubuntu-latest)

Can't find 'action.yml', 'action.yaml' or 'Dockerfile' under '/home/runner/work/wdl/wdl/.github/actions/install-shellcheck'. Did you forget to run actions/checkout before running your local action?

gauntlet (ubuntu-latest)

Can't find 'action.yml', 'action.yaml' or 'Dockerfile' under '/home/runner/work/wdl/wdl/.github/actions/install-shellcheck'. Did you forget to run actions/checkout before running your local action?

arena (windows-latest)

Can't find 'action.yml', 'action.yaml' or 'Dockerfile' under 'D:\a\wdl\wdl\.github\actions\install-shellcheck'. Did you forget to run actions/checkout before running your local action?

gauntlet (macos-latest)

Can't find 'action.yml', 'action.yaml' or 'Dockerfile' under '/Users/runner/work/wdl/wdl/.github/actions/install-shellcheck'. Did you forget to run actions/checkout before running your local action?

gauntlet (windows-latest)

Can't find 'action.yml', 'action.yaml' or 'Dockerfile' under 'D:\a\wdl\wdl\.github\actions\install-shellcheck'. Did you forget to run actions/checkout before running your local action?

format

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lint (windows-latest)

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lint (windows-latest)

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test (windows-latest)

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test (windows-latest)

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lint (ubuntu-latest)

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