Add Nuxt fixed release references

[cookesan]

Summary

• add the Nuxt 3.21.7 and 4.4.7 fixed release references
• keep the NVD advisory reference for CVE-2026-56326

Validation

• confirmed the advisory aliases CVE-2026-56326 and affects the npm nuxt package
• confirmed the advisory fixed versions are 3.21.7 and 4.4.7
• confirmed the Nuxt v3.21.7 and v4.4.7 release URLs return HTTP 200 and identify the releases as security hotfixes
• confirmed the v3.21.6...v3.21.7 comparison contains the referenced 3.x fix commits for navigateTo, reloadNuxtApp, and script protocol handling
• confirmed the v4.4.6...v4.4.7 comparison contains the referenced 4.x fix commits for navigateTo, reloadNuxtApp, and script protocol handling
• confirmed upstream PRs #35115 and #35206 are merged
• confirmed npm has nuxt 3.21.7 and 4.4.7 package metadata with tarball integrity data
• confirmed NVD returns CVE-2026-56326 with status Analyzed
• ran jq empty on the advisory JSON
• ran git diff --check