Add piscina CVE-2026-55388 NVD reference

Author: cookesan

advisories/github-reviewed/2026/06/GHSA-x9g3-xrwr-cwfg/GHSA-x9g3-xrwr-cwfg.json

@@ -84,6 +84,10 @@
       "type": "WEB",
       "url": "https://github.com/piscinajs/piscina/security/advisories/GHSA-x9g3-xrwr-cwfg"
     },
+    {
+      "type": "ADVISORY",
+      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55388"
+    },
     {
       "type": "PACKAGE",
       "url": "https://github.com/piscinajs/piscina"
@@ -99,4 +103,4 @@
     "github_reviewed_at": "2026-06-18T13:05:11Z",
     "nvd_published_at": null
   }
-}
+}