Updated mainline nginx to 1.27.3.

[thresheek]

Proposed changes

Updated mainline nginx to 1.27.3 and njs to 0.8.7.

Checklist

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

• I have read the CONTRIBUTING document
• I have run ./update.sh and ensured all entrypoint/Dockerfile template changes have been applied to the relevant image entrypoint scripts & Dockerfiles
• If applicable, I have added tests that prove my fix is effective or that my feature works
• If applicable, I have checked that any relevant tests pass after adding my changes
• I have updated any relevant documentation

[oxpa]

lgtm
As a warning, last time I generated OI library using docker-nginx commits I pushed to my local copy to make a PR.
Those pulled after merge had different hashes and OI machinery didn't like it.

[thresheek]

Oh for sure. I'm not entirely sure how we can prevent that kind of error though.