Update dependency body-parser to v1.20.6 (TryGhost#29592)

Author: tryghost-renovate[bot]

ghost/core/package.json

@@ -140,7 +140,7 @@
         "@tryghost/validator": "0.2.22",
         "@tryghost/version": "2.3.2",
         "@tryghost/zip": "3.5.1",
-        "body-parser": "1.20.5",
+        "body-parser": "1.20.6",
         "bookshelf": "1.2.0",
         "bookshelf-relations": "2.8.0",
         "bson-objectid": "catalog:",