Documentation update for issue #29

[quantstruct-canvas-preview]

Attempt to resolve issue 29

I reviewed the provided documents for two style issues:

• Articles before NGINX product names, e.g., “the NGINX Controller Agent.”
• Product capitalization consistency, notably “NGINX One Console” and “NGINX Plus” instead of “NGINX+” or “NGINX plus.”

Findings:

• content/nginx-one/about.md: Starts with “The F5 NGINX One Console …”; later uses “NGINX One offers …” which should be “NGINX One Console …” for consistency.
• content/agent/changelog.md: Contains “NGINX plus” (should be “NGINX Plus”).
• content/controller/releases/adc/adc-release-notes-3.22.md:
  • Uses “the NGINX Controller App Delivery Module” and “the NGINX Controller Agent” in a few places; remove “the.”
  • Uses “NGINX+” in two spots; should be “NGINX Plus.”

Other documents didn’t exhibit the targeted issues.