Add benchmark model script instructions

Added instructions for running the complete benchmark model script and verifying output files.

Author: pareenaverma

content/learning-paths/mobile-graphics-and-gaming/measure-kleidiai-kernel-performance-on-executorch/06-create-matrix-mul-model.md

@@ -77,6 +77,18 @@ When exporting models, the **generate_etrecord** option is enabled to produce th
 These ETRecord files are essential for subsequent model analysis and performance evaluation.
 {{%/notice%}}
 
+### Run the Complete Benchmark Model Script
+Instead of executing each export block manually, you can download and run the full matrix-multiply benchmark script.
+This script automatically builds and exports both FP16 and FP32 models, performing all necessary partitioning, lowering, and ETRecord generation.
+
+```bash
+wget https://raw.githubusercontent.com/pareenaverma/arm-learning-paths/refs/heads/content_review/content/learning-paths/mobile-graphics-and-gaming/measure-kleidiai-kernel-performance-on-executorch/export-matrix-mul.py
+chmod +x export-matrix-mul.py
+python3 ./export-matrix-mul.py
+```
+
+### Verify the output
+
 After running this script, both the PTE model file and the etrecord file are generated.
 
 ``` bash 
@@ -86,5 +98,6 @@ model/matrix_mul_pf16_gemm.pte
 model/matrix_mul_pf32_gemm.etrecord
 model/matrix_mul_pf32_gemm.pte
 ```
+These files are the inputs for upcoming executor_runner benchmarks, where you’ll measure and compare KleidiAI micro-kernel performance.
 
 The complete source code is available [here](../export-matrix-mul.py).