bump(carta-investors): d5b6b4cd → 515c0892 (#3682)

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

.claude-plugin/marketplace.json

@@ -599,7 +599,7 @@
         "url": "https://github.com/carta/plugins.git",
         "path": "plugins/carta-investors",
         "ref": "main",
-        "sha": "d5b6b4cdd83a7b25118c14143a16554aa030e69d"
+        "sha": "515c08928d76d3b1b515a63a82bf7272dff1578f"
       },
       "homepage": "https://carta.com"
     },