Update 1_spars_checkout.md

Author: SecureFromScratch

csharp/recipes_2026/challanges/preps/1_spars_checkout.md

@@ -1,15 +1,15 @@
-# Clone the repository with blob filtering (no initial checkout)
+### Clone the repository with blob filtering (no initial checkout)
 git clone --no-checkout --filter=blob:none https://github.com/SecureFromScratch/Workshops.git
 
-# Enter the cloned repository directory
+### Enter the cloned repository directory
 cd Workshops
 
-# Initialize sparse checkout in cone mode
+### Initialize sparse checkout in cone mode
 git sparse-checkout init --cone
 
-# Set sparse checkout to only include the Recipes directory
+### Set sparse checkout to only include the Recipes directory
 # Note: typo fixed - "challenges" not "challanges"
 git sparse-checkout set csharp/recipes_2026/challanges/Recipes
 
-# Checkout the main branch
+### Checkout the main branch
 git checkout main