bump(carta-investors): 193e1a48 → a8b2c4bb (#3982)

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

.claude-plugin/marketplace.json

@@ -606,7 +606,7 @@
         "url": "https://github.com/carta/plugins.git",
         "path": "plugins/carta-investors",
         "ref": "main",
-        "sha": "193e1a48b45599aa7d1d371d1d8c70e5ad20b13a"
+        "sha": "a8b2c4bb64765d6fff78019679eda0641de5cdf8"
       },
       "homepage": "https://carta.com"
     },