fix(deps): update dependency resend to v6.0.3

Author: renovate[bot]

package.json

@@ -11,7 +11,7 @@
     "@react-email/components": "0.5.1",
     "react": "19.1.0",
     "react-dom": "19.1.0",
-    "resend": "6.0.1"
+    "resend": "6.0.3"
   },
   "devDependencies": {
     "@biomejs/biome": "2.2.0",