bump(resend): 40449a2b → 4b1558df (#5195)

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

.claude-plugin/marketplace.json

@@ -2976,7 +2976,7 @@
       "source": {
         "source": "url",
         "url": "https://github.com/resend/resend-skills.git",
-        "sha": "40449a2b7c0d9db1fc822b2e4489290066b42155"
+        "sha": "4b1558df96241f0a7eb416a1ce262650f2a5f471"
       },
       "homepage": "https://resend.com"
     },