refactor: update titles for clarity in CPU hotspots guide

Author: madeline-underwood

content/learning-paths/servers-and-cloud-computing/cpu_hotspot_performix/_index.md

@@ -4,7 +4,7 @@ description: Learn how to profile and identify CPU hotspots in C++ applications
 
 minutes_to_complete: 30
 
-who_is_this_for: Software developers and performance engineers who want to identify code hotspots in applications running on Arm Linux systems.
+who_is_this_for: This is an introductory topic for software developers and performance engineers who want to identify code hotspots in applications running on Arm Linux systems.
 
 learning_objectives: 
     - Run the Code Hotspots recipe in Arm Performix

content/learning-paths/servers-and-cloud-computing/cpu_hotspot_performix/how-to-1.md

@@ -1,5 +1,5 @@
 ---
-title: Background Information
+title: Understand flame graphs and profiling tools
 weight: 2
 
 ### FIXED, DO NOT MODIFY

content/learning-paths/servers-and-cloud-computing/cpu_hotspot_performix/how-to-2.md

@@ -1,5 +1,5 @@
 ---
-title: Setup
+title: Build the example application
 weight: 3
 
 ### FIXED, DO NOT MODIFY

content/learning-paths/servers-and-cloud-computing/cpu_hotspot_performix/how-to-3.md

@@ -1,5 +1,5 @@
 ---
-title: Assess Baseline Performance
+title: Profile baseline performance
 weight: 4
 
 ### FIXED, DO NOT MODIFY

content/learning-paths/servers-and-cloud-computing/cpu_hotspot_performix/how-to-4.md

@@ -1,5 +1,5 @@
 ---
-title: Optimize
+title: Optimize application performance
 weight: 5
 
 ### FIXED, DO NOT MODIFY
@@ -46,7 +46,7 @@ There is negligible difference in perceived image quality when halving `MAX_ITER
 
 ![Side-by-side comparison of Mandelbrot fractal output at MAX_ITERATIONS 1024 (left) and 512 (right). Both images show the same level of detail and structure, confirming that the reduced iteration count doesn't compromise visual quality.#center](./comparison.jpg "Image quality comparison: 1024 vs 512 iterations")
 
-### Optimization 2 - Parallelising the hot function
+### Optimization 2 - Parallelizing the hot function
 
 The loop in `Mandelbrot::getIterations` has no loop-carried dependencies — each iteration's result is independent of any other. This means you can parallelize the hot function across multiple threads if your CPU has multiple cores.