bump(neon): 329882a3 → b42b30e5 (#5106)

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

.claude-plugin/marketplace.json

@@ -2355,7 +2355,7 @@
         "url": "https://github.com/neondatabase/agent-skills.git",
         "path": "plugins/neon-postgres",
         "ref": "main",
-        "sha": "329882a358f05b7b1b24d64f56dc3b6d3a454f54"
+        "sha": "b42b30e5690a60095cabcf406958cd7d73f5724a"
       },
       "homepage": "https://github.com/neondatabase/agent-skills/tree/main/plugins/neon-postgres"
     },