bump(resend): cad68a4e → 8a977503 (#4136)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

.claude-plugin/marketplace.json

@@ -2617,7 +2617,7 @@
       "source": {
         "source": "url",
         "url": "https://github.com/resend/resend-skills.git",
-        "sha": "cad68a4e55cebe6e5ee613d9cf987a6b9ea19317"
+        "sha": "8a977503dc13160b1d2463471a62a689f2a5767b"
       },
       "homepage": "https://resend.com"
     },