Don't cancel in progress runs of CLA bot

[lucacome]

Proposed changes

We have a bot that adds comments to the community PRs and triggers a second run of the workflow right away. This means that the first run that was actually checking the CLA gets canceled and the check doesn't run.

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

Release notes

If this PR introduces a change that affects users and needs to be mentioned in the release notes,
please add a brief note that summarizes the change.

NONE