Can't use multiple line val in env_vars

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TL;DR

I'm trying to deploy to cloud run and one of the env_vars has a value that is multi line, specifically it is a PEM key. This seems to make the key not be used properly in cloud run UI. The problem is with GH_APP_PRIVATE_KEY Tried with with both "" and without.

In the google console UI the output looks like this

This might be a yaml question more than a deploy-cloudrun one.

Expected behavior

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Observed behavior

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Action YAML

- name: Deploy to Google Cloud Run
        uses: google-github-actions/deploy-cloudrun@v2

        with:
          service: ${{ env.RUN_SERVICE }}
          image: ${{ env.GAR_LOCATION }}
          region: ${{ env.REGION }}

          env_vars: |-
            DEBUG='False'
            GH_APP_PRIVATE_KEY=${{ secrets.GH_APP_PRIVATE_KEY }}

Log output

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Additional information

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