Fix broken URL in morgan.mdx custom format example

[brmendez]

Summary

• Fixed a stray GitHub URL that was accidentally inserted into the tokens['response-time'](req, res) call in the custom format function example, breaking the code sample.
• Scoped to en only. The same bad URL also exists in the translated copies (ja, it, zh-cn, zh-tw, pt-br, de, ko, fr, es).

Test plan

• Verified the code block now renders valid JS matching the pattern used elsewhere on the page.

[netlify]

✅ Deploy Preview for expressjscom-preview ready!

Name	Link
🔨 Latest commit	aadbb97
🔍 Latest deploy log	https://app.netlify.com/projects/expressjscom-preview/deploys/6aac482524422c0008bc952e
😎 Deploy Preview	https://deploy-preview-2515--expressjscom-preview.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 96 (🔴 down 1 from production) Accessibility: 100 (no change from production) Best Practices: 100 (no change from production) SEO: 100 (no change from production) PWA: 80 (no change from production) View the detailed breakdown and full score reports
🤖 Make changes	Run an agent on this branch

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[krzysdz]

This is a problem with the way how the get-readmes.sh script converts relative GitHub URLs. The script uses simple regular expressions and cannot detect that this is code inside a code block that looks like a link [something](URL).

expressjs.com/.github/scripts/get-readmes.sh

Lines 157 to 159 in c936b63

	# Convert relative links to absolute GitHub URLs
	BASEURL="https://github.com/$org/$repo/blob/HEAD"
	CONTENT=$(echo "$CONTENT" | sed -E "s|\]\(([^)#/][^):]*)\)|](${BASEURL}/\1)|g")

There is a workflow which replaces the content of this file with up-to-date readmes, so manual changes are overwritten. If you have an idea how to fix the script, then go ahead and edit this PR or create a new one.

cc @bjohansebas

[brmendez]

Fixed by skipping fenced code blocks in the link-rewrite regex. Doesn't cover inline single-backtick code spans, but none of the current READMEs use that.