Update building-howto.md to include example on pulling down repo source for better user reference

The current readme instruction is confusing which causing user to pull down wrong commit source. Adding an example instruction into readme will helps better reference for user.

Author: azril-ahmad

docs/developer-guide/get-started/building-howto.md

@@ -28,12 +28,16 @@ approach, as building the *entire toolchain* may take a lot of time. Adding the
 ```bash
 # Clone the repository
 git clone <Microvisor git repo>
+# Example: git clone https://github.com/open-edge-platform/edge-microvisor-toolkit.git
+
+# Enter repository directory
 cd <Microvisor repo>
 
-# Checkout stable branch of Microvisor
-git checkout <latest stable>
+# Checkout stable tag of Microvisor
+git checkout <stable tag>
+# Example: git checkout 3.0.20250411
 
-# Build the tools
+# Enter toolkit folder and build the tools
 cd ./toolkit
 sudo make toolchain REBUILD_TOOLS=y
 ```