example:gpio-blink: Fix readme file formatting

Signed-off-by: Ajay Bhargav <[email protected]>

Author: ajaybhargav

examples/gpio-blink/readme.rst

@@ -4,16 +4,20 @@ How to build
 1. Install `Visual Studio Code <https://code.visualstudio.com/>`_
 2. Install `PlatformIO Extension for VSCode <https://platformio.org/platformio-ide>`_
 3. Install SiWi GSM Platform:
-	* Open PlatformIO Home
-	* Go to Platforms -> Advanced Installation
-	* Paste repository link https://github.com/siwiembedded/platform-siwigsm.git
-	* Click Install
+
+   * Open PlatformIO Home
+   * Go to Platforms -> Advanced Installation
+   * Paste repository link https://github.com/siwiembedded/platform-siwigsm.git
+   * Click Install
+
 4. Download and Extract examples from github https://github.com/siwiembedded/siwigsm/archive/master.zip
-5. Extract and Open example folder with _VSCode_
+5. Extract and Open example folder with *VSCode*
 6. Run following command:
+
 .. code-block:: bash
-	# Build Project
-	$ platformio run
-	
-	# Upload Project
-	$ platformio run --target upload
+
+   # Build Project
+   $ platformio run
+
+   # Upload Project
+   $ platformio run --target upload