Rename azure-ai-foundry-agent-service to foundry-agent-service

Updated based on feedback from the PR Fix team.

Author: Albertyang0

learn-pr/paths/develop-ai-agents-on-azure/index.yml

@@ -22,6 +22,7 @@ roles:
 products:
   - foundry-tools
   - microsoft-foundry
+  - foundry-agent-service
   - azure-ai-foundry-sdk
 subjects:
   - artificial-intelligence