fix: update waf supported versions for NIM 2.21.0

[balakoteswar]

Proposed changes

• Updating the WAF supported versions for NIM v2.21.0
• Minor fix for make docs failure, removed the duplicate entry.

Error Logs:

% make docs
Makefile:10: Hugo is not available or using a version less than 151. Attempting to use docker. HUGO_VERSION=
docker run --rm -it -v /Users/b.panchakshari/workspace/nginx/git-repos/documentation:/src -p 1313:1313 hugomods/hugo:std-go-git-0.152.2 /src/hugo-entrypoint.sh
hugo: downloading modules …
hugo: collected modules in 3195 msgo: downloading github.com/nginxinc/nginx-hugo-theme v1.0.16
Start building sites …
hugo v0.152.2 linux/arm64 BuildDate=2025-10-24T16:37:57Z VendorInfo=hugomods

Total in 1291 ms
Error: error building site: process: readAndProcessContent: "/src/content/nim/admin-guide/authentication/oidc/microsoft-entra-setup.md:8:1": [7:1] mapping key "nd-product" already defined at [5:1]
   4 | nd-content-type: how-to
   5 | nd-product: NIMNGR
   6 | nd-docs: DOCS-795
>  7 | nd-product: NIMNGR
       ^
make: *** [docs] Error 1

Checklist

Before sharing this pull request, I completed the following checklist:

• I read the Contributing guidelines
• My branch adheres to the Git conventions
• My content changes adhere to the F5 NGINX Documentation style guide
• If my changes involve potentially sensitive information¹, I have assessed the possible impact
• I have waited to ensure my changes pass tests, and addressed any discovered issues

Footnotes

1. Potentially sensitive information includes personally identify information (PII), authentication credentials, and live URLs. Refer to the style guide for guidance about placeholder content. ↩

[github-actions]

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