fix parity upgrade action by updating CircleCI URL

[alexrashed]

Motivation

We recently had a few changes to our pipelines.
#1342 already adjusted the Parity Update scripts to some of the changes.
Unfortunately, we've overlooked one change: The pipeline in CircleCI in localstack/localstack has been changed such that it is not called main anymore: localstack/localstack#11049 renamed main to full-run and introduced a new acceptance-only-run.

Unfortunately, we haven't realized that this would have to change this here as well.
Now the artifacts of the old pipeline are not available anymore, which is why the run failed: https://github.com/localstack/docs/actions/runs/10242910192

Changes

• This PR fixes the parity update action by referencing the correct workflow again.

Testing

• Triggered a run from this PR to verify that the download of the artifacts is fixed by the changes in this PR.
  • Update Parity Coverage Docs #1416 was created by the run, which verifies that the fix is working.

[github-actions]

🎊 PR Preview has been successfully built and deployed to https://localstack-docs-preview-pr-1415.surge.sh 🎊

[steffyP]

Thanks for jumping onto it 🙌