fix: upgrade handlebars to 4.7.9 to resolve critical vulnerability (#28625)

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

packages/features/auth/package.json

@@ -15,7 +15,7 @@
     "@calcom/ui": "workspace:*",
     "bcryptjs": "2.4.3",
     "dub": "0.59.1",
-    "handlebars": "4.7.7",
+    "handlebars": "4.7.9",
     "jose": "4.15.9",
     "lru-cache": "9.0.3",
     "next-auth": "4.24.13",