fix: update agent framework package names in requirements.txt

Author: Pavan-Microsoft

src/api/requirements.txt

@@ -16,7 +16,8 @@ azure-identity==1.25.0
 azure-search-documents==11.7.0b1
 azure-ai-projects==2.0.0b2
 azure-ai-inference==1.0.0b9
-agent-framework==1.0.0b251120
+agent-framework-azure-ai==1.0.0b251120
+agent-framework-core==1.0.0b251120
 azure-cosmos==4.9.0
 
 # Additional utilities