Describe the bug
After the latest update (v2.7.0) our pipelines started failing due to unexpected tokens in JSON. Downgrading to v2.6.0 solved the issue.

To Reproduce
As an example, in the Vault, in the key-value engine, there's Google Service Account JSON content. It's been working fine, but now when it's passed to google-github-actions/auth action, it fails with:

google-github-actions/auth failed with: retry function failed after 4 attempts: failed to parse service account key JSON credentials: unexpected token \ in JSON at position 1

Additional context
Related to this: #466

cc @fairclothjm