refactor: csharp AI V2 readme

Author: yuqizhou77

templates/vs/csharp/custom-copilot-assistant-assistants-api/.{{NewProjectTypeName}}/README.md.tpl

@@ -109,7 +109,7 @@ You can follow [Build an AI Agent in Teams](https://aka.ms/teamsfx-ai-agent) to
 - [Add functions](https://aka.ms/teamsfx-ai-agent#add-functions-with-assistants-api)
 
 ## Additional information and references
-- [Teams AI library V2](https://aka.ms/teams-ai-library-v2)
+- [Teams AI library](https://aka.ms/teams-ai-library)
 - [Microsoft 365 Agents Toolkit Documentations](https://docs.microsoft.com/microsoftteams/platform/toolkit/teams-toolkit-fundamentals)
 - [Microsoft 365 Agents Toolkit CLI](https://aka.ms/teamsfx-toolkit-cli)
 - [Microsoft 365 Agents Toolkit Samples](https://github.com/OfficeDev/TeamsFx-Samples)

templates/vs/csharp/custom-copilot-assistant-new/.{{NewProjectTypeName}}/README.md.tpl

@@ -76,7 +76,7 @@ The app template is built using the Teams AI library, which provides the capabil
 You can follow [Get started with Teams AI library](https://learn.microsoft.com/en-us/microsoftteams/platform/bots/how-to/teams%20conversational%20ai/how-conversation-ai-get-started) to extend the agent template with more AI capabilities.
 
 ## Additional information and references
-- [Teams AI library V2](https://aka.ms/teams-ai-library-v2)
+- [Teams AI library](https://aka.ms/teams-ai-library)
 - [Microsoft 365 Agents Toolkit Documentations](https://docs.microsoft.com/microsoftteams/platform/toolkit/teams-toolkit-fundamentals)
 - [Microsoft 365 Agents Toolkit CLI](https://aka.ms/teamsfx-toolkit-cli)
 - [Microsoft 365 Agents Toolkit Samples](https://github.com/OfficeDev/TeamsFx-Samples)

templates/vs/csharp/custom-copilot-rag-azure-ai-search/.{{NewProjectTypeName}}/README.md.tpl

@@ -3,7 +3,7 @@
 This app template showcases how to build one of the most powerful applications enabled by LLM - sophisticated question-answering (Q&A) agent that can answer questions about specific source information right in the Microsoft Teams.
 This app template also demonstrates usage of techniques like: 
 - [Retrieval Augmented Generation](https://python.langchain.com/docs/use_cases/question_answering/#what-is-rag), or RAG.
-- [Teams AI Library](https://aka.ms/teams-ai-library-v2)
+- [Teams AI Library V2](https://aka.ms/teams-ai-library-v2)
 
 ## Get started with the template