Udapte tutorial content

Author: canchebagur

content/learn/02.microcontrollers/04.debugging/debugging.md

@@ -163,7 +163,7 @@ The [Arduino® Portenta H7](https://store.arduino.cc/products/portenta-h7), [H7
 
 * [Lauterbach TRACE32 GDB Front-End Debugger for Portenta H7](https://docs.arduino.cc/tutorials/portenta-h7/por-ard-trace32).
 
-![The Arduino® Portenta H7](assets/debugging_img09.png).
+![The Arduino® Portenta H7.](assets/debugging_img09.png)
 
 ### Hardware Tools
 
@@ -185,6 +185,8 @@ A logic analyzer is a hardware tool designed specifically for capturing, display
 
 ![24MHz, 8-channel logic analyzer. Source: Sparfun Electronics®.](assets/debugging_img01.png)
 
+> "Sparkfun® images are [CC BY 2.0](https://creativecommons.org/licenses/by/2.0/)"
+
 #### Oscilloscopes
 
 An oscilloscope is a hardware tool that graphically displays electrical signals and shows how those signals change over time. Signals are measured in an oscilloscope with the help of a sensor.