Add note on Multi-Agent RAG pattern in CX stories

Added a note about the Cross-cutting Pattern: Multi-Agent RAG and its benefits.

Author: brown9804

0_Azure/_industry-specific/1_Retail/1_AI_CX_Stories.md

@@ -10,6 +10,8 @@ Last updated: 2025-12-30
 
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+> Here you can search for more [Microsoft Customer Success Stories](https://www.microsoft.com/en-us/customers/search)
+
 > [!NOTE]
 > **Cross-cutting Pattern: Multi-Agent RAG**
 > - Many of these solutions `rely on multiple specialized agents retrieving enterprise data and augmenting generation with factual grounding.`