Update titles in RAG documentation for clarity and consistency

Author: madeline-underwood

content/learning-paths/laptops-and-desktops/dgx_spark_rag/1_rag.md

@@ -1,5 +1,5 @@
 ---
-title: Build a RAG pipeline on Arm-based Grace–Blackwell (GB10) systems
+title: Build a RAG pipeline on Arm-based Grace–Blackwell systems
 weight: 2
 
 ### FIXED, DO NOT MODIFY

content/learning-paths/laptops-and-desktops/dgx_spark_rag/3_rag_pipeline.md

@@ -1,5 +1,5 @@
 ---
-title: Build and run the RAG pipeline on Arm-based Grace–Blackwell (GB10) systems
+title: Build and run the RAG pipeline
 weight: 5
 layout: "learningpathall"
 ---

content/learning-paths/laptops-and-desktops/dgx_spark_rag/4_rag_memory_observation.md

@@ -1,5 +1,5 @@
 ---
-title: Monitor unified memory performance on Arm-based Grace–Blackwell systems
+title: Monitor unified memory performance
 weight: 6
 layout: "learningpathall"
 ---