docs: point request.hostname URL link at current Node.js docs

[FirmaSpring]

Problem

docs/api/request.md (request.hostname) links the WHATWG URL API at

https://nodejs.org/dist/latest-v8.x/docs/api/url.html#url_the_whatwg_url_api

That is the Node.js 8 documentation snapshot. Node 8 has been EOL since 2019, and Koa itself requires node >= 18 (package.json engines). New WHATWG URL features referenced by current Koa behavior (e.g. URL available globally, url.URL parsing used for IPv6 hostnames) are documented in the current docs, not the Node 8 snapshot.

Solution

Link to the current WHATWG URL API section:

https://nodejs.org/api/url.html#the-whatwg-url-api

Verification

• curl -L -o /dev/null -w "%{http_code}" returns 200 for the new URL.
• The anchor #the-whatwg-url-api exists on the page (section "The WHATWG URL API").
• grep -n "engines" -A2 package.json shows "node": ">= 18".

Summary by Sourcery

Documentation:

• Update the WHATWG URL API link in request.hostname docs to point to the current Node.js documentation.

Summary by CodeRabbit

• Documentation
  • Updated the request.hostname documentation link to reference the current Node.js URL API documentation.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Updates Koa request.hostname documentation to link to the current Node.js WHATWG URL API instead of an outdated Node 8 snapshot.

File-Level Changes

Change	Details	Files
Update documentation link for WHATWG URL API to point at the current Node.js docs that align with Koa’s supported Node versions.	Replace the outdated Node 8 WHATWG URL API URL with the canonical current Node.js WHATWG URL API section URL. Ensure the anchor in the new URL points directly to the "The WHATWG URL API" section.	docs/api/request.md

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: edd4683c-f9b7-400e-9eb2-40ed90520171

📥 Commits

Reviewing files that changed from the base of the PR and between e145325 and a4ca5ee.

📒 Files selected for processing (1)

• docs/api/request.md

Included review availability: Your plan includes up to 10 reviews per rolling hour; 9 remain after this review.

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📝 Walkthrough

Walkthrough

The request.hostname documentation now links to the current Node.js URL API reference instead of the obsolete Node.js v8 URL reference. No exported or public declarations changed.

Merge Risk: ⚪ Minimal · up to a4ca5

This is a localized documentation-only link update with no runtime or product behavior change, so no actionable merge-blocking risk remains after normal checks and review.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the documentation link update for request.hostname.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.90%. Comparing base (e145325) to head (a4ca5ee).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1994   +/-   ##
=======================================
  Coverage   99.90%   99.90%           
=======================================
  Files           9        9           
  Lines        2109     2109           
=======================================
  Hits         2107     2107           
  Misses          2        2           

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[yowainwright]

Copied from human-written text in #1995

The link update change and summation are correct! 👍

Tested: There is no change in webkit based browsers
by switching to the current linking mechanism vs what is there today.
so I'm unsure if the juice is worth the squeeze. 🤔