docs: Revamp NGINX technical specs summary table

[ChisomUma]

Proposed changes

• Revamped NGINX technical specs summary table, listing all Linux distros on each row and NGINX modules on each column.
• Added ticks when supported and crosses when not supported.
• Previewd changes locally, see image below:

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]

✅ All required contributors have signed the F5 CLA for this PR. Thank you!
_{Posted by the CLA Assistant Lite bot.}

[ChisomUma]

I have hereby read the F5 CLA and agree to its terms

[ChisomUma]

recheck

[ADubhlaoich]

I like it! @y82's call as the primary technical writer for this content.

[ChisomUma]

I have hereby read the F5 CLA and agree to its terms

[ChisomUma]

recheck

[mjang]

Hi @ChisomUma , I see you've signed the CLA as @ChisomUma . However, I think the bot is asking you to sign from the @UmaChisom account.

Can you sign in as @UmaChisom and try again, please?

[UmaChisom]

I have hereby read the F5 CLA and agree to its terms

[UmaChisom]

recheck

[ChisomUma]

Hi @ChisomUma , I see you've signed the CLA as @ChisomUma . However, I think the bot is asking you to sign from the @UmaChisom account.

Can you sign in as @UmaChisom and try again, please?

Oh yes, it worked now. Thank you!

[ChisomUma]

Hi @y82 I have responded to requested changes