fix: Github CI example fails with single quote

[McPatate]

Description:

I am proposing a fix for the CI example in the README.

When someone commits a message containing a ', the CI will error given the raw JSON is simply enclosed with single quotes:

jq length <<< '${{ toJson(github.event.commits) }}'

cf huggingface/huggingface.js#754 for more context

Checklist:

• [ ] Tests passing (make test-community)?
• [ ] Lint passing (make lint this requires golangci-lint)?

[CLAassistant]

All committers have signed the CLA.

[dustin-decker]

What about this? Seems cleaner to not have a temp file or the Env: part of the config:

depth=$(($(jq length <<< "${{ toJson(github.event.commits) }}") + 2))
echo "depth=$depth" >> $GITHUB_ENV