doc fix

Author: chenyushuo

examples/grpo_email_search/README.md

@@ -1,6 +1,6 @@
 # Email Search Workflow
 
-This example shows a multi-turn email search workflow, inspired by [ART](https://openpipe.ai/blog/art-e-mail-agent?refresh=1756431423904). We implement a ReAct Agent and define tools for email search. Note that this example requires installing `AgentScope==0.1.6`.
+This example shows a multi-turn email search workflow, inspired by [ART](https://openpipe.ai/blog/art-e-mail-agent?refresh=1756431423904). We implement a ReAct Agent and define tools for email search. Note that this example requires installing [AgentScope](https://github.com/agentscope-ai/agentscope?tab=readme-ov-file#-installation).
 
 For more detailed information, please refer to the [documentation](../../docs/sphinx_doc/source/tutorial/example_search_email.md).