update WAFv5 version

[vepatel]

Proposed changes

• Update pinned versions of WAFv5 based on https://docs.nginx.com/nginx-app-protect-waf/v5/releases/about-5.7/#nginx-plus

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