chore(deps): bump next from 15.5.7 to 15.5.9 (#862)

Author: dependabot[bot]

package-lock.json

@@ -21,7 +21,7 @@
     "@googleapis/sheets": "^7.0.0",
     "axios": "^1.12.0",
     "net": "^1.0.2",
-    "next": "^15.5.7",
+    "next": "^15.5.9",
     "next-on-netlify": "^3.0.1",
     "nodemailer": "^7.0.11",
     "react": "^18.2.1",