bump(exa): 5d08e36f → a664592b (#4781)

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

.claude-plugin/marketplace.json

@@ -1396,7 +1396,7 @@
       "source": {
         "source": "url",
         "url": "https://github.com/exa-labs/exa-mcp-server.git",
-        "sha": "5d08e36fac76fb3f237885dde66d61eec8e9e33e"
+        "sha": "a664592b5dd7c5598b70158c771dcc5c2a4fb2c1"
       },
       "homepage": "https://exa.ai/docs/reference/exa-mcp"
     },