Update dependency jsonwebtoken to v9 [SECURITY]

Author: renovate[bot]

ghost/core/package.json

@@ -178,7 +178,7 @@
     "js-yaml": "4.1.0",
     "json-stable-stringify": "1.3.0",
     "jsonpath": "1.1.1",
-    "jsonwebtoken": "8.5.1",
+    "jsonwebtoken": "9.0.0",
     "juice": "9.1.0",
     "keypair": "1.0.4",
     "knex": "2.4.2",

ghost/magic-link/package.json

@@ -29,6 +29,6 @@
     "@tryghost/errors": "1.3.5",
     "@tryghost/tpl": "0.1.32",
     "@tryghost/validator": "0.2.14",
-    "jsonwebtoken": "8.5.1"
+    "jsonwebtoken": "9.0.0"
   }
 }