Modify codeAct paper link (#3076)

agenthub/codeact_agent/codeact_agent.py

@@ -54,7 +54,7 @@ class CodeActAgent(Agent):
 
     ### Overview
 
-    This agent implements the CodeAct idea ([paper](https://arxiv.org/abs/2402.13463), [tweet](https://twitter.com/xingyaow_/status/1754556835703751087)) that consolidates LLM agents’ **act**ions into a unified **code** action space for both *simplicity* and *performance* (see paper for more details).
+    This agent implements the CodeAct idea ([paper](https://arxiv.org/abs/2402.01030), [tweet](https://twitter.com/xingyaow_/status/1754556835703751087)) that consolidates LLM agents’ **act**ions into a unified **code** action space for both *simplicity* and *performance* (see paper for more details).
 
     The conceptual idea is illustrated below. At each turn, the agent can: