feat(blog): create post for v26.5.1

[github-actions]

Creates a new blog post for v26.5.1

Check this workflow's logs at https://github.com/nodejs/nodejs.org/actions/runs/30458917030.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
nodejs-org	Ready	Preview	Jul 29, 2026 2:04pm

[cursor]

PR Summary

Low Risk
Documentation-only site content with no runtime or application logic changes.

Overview
Adds a new release blog post at apps/site/pages/en/blog/release/v26.5.1.md announcing Node.js 26.5.1 (Current) as a security release (2026-07-29).

The post documents ten CVE fixes across http2, permission, https, sqlite, dns, zlib, and http, plus dependency bumps (llhttp 9.4.3, undici 8.9.0). It includes the usual commit list, platform download links, and PGP-signed SHASUMS—matching the existing release-post format (e.g. v26.5.0.md).

^{Reviewed by Cursor Bugbot for commit 80744f3. Bugbot is set up for automated code reviews on this repo. Configure here.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.13%. Comparing base (34f572b) to head (80744f3).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9044      +/-   ##
==========================================
+ Coverage   75.12%   75.13%   +0.01%     
==========================================
  Files         102      102              
  Lines        9109     9109              
  Branches      372      373       +1     
==========================================
+ Hits         6843     6844       +1     
+ Misses       2262     2261       -1     
  Partials        4        4              

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

[Copilot]

Pull request overview

Adds the Node.js v26.5.1 release blog post to the website, publishing the release notes (notable security fixes, commit list) along with download links and SHASUMS for verification.

Changes:

• Introduces a new release post page for Node.js 26.5.1 (Current).
• Documents CVE-related notable changes plus included dependency updates.
• Includes distribution download URLs and the signed SHASUMS block for v26.5.1.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[github-actions]

📦 Build Size Comparison

Summary

Metric	Value
Old Total First Load JS	10.65 MB
New Total First Load JS	10.66 MB
Delta	2.00 KB (+0.02%)

Changes

🔄 Modified Routes (4)

Route	Old First Load JS	New First Load JS	Delta
/[locale]	2.54 MB	2.54 MB	📈 513.00 B (+0.02%)
/[locale]/[...path]	2.54 MB	2.54 MB	📈 513.00 B (+0.02%)
/[locale]/blog/[...path]	2.54 MB	2.54 MB	📈 513.00 B (+0.02%)
/[locale]/download/archive/[version]	2.54 MB	2.54 MB	📈 513.00 B (+0.02%)