Merge pull request #3098 from madeline-underwood/asm

Update documentation for Arm assembler functions, adding a descriptio…

Author: jasonrandrews

content/learning-paths/embedded-and-microcontrollers/asm/_index.md

@@ -2,6 +2,7 @@
 title: Write Arm Assembler functions
 
 minutes_to_complete: 60
+description: Learn how to write mixed C and assembly programs for Cortex-M microcontrollers using Keil MDK, following Arm Procedure Call Standard conventions.
 
 author: Ronan Synnott
 

content/learning-paths/embedded-and-microcontrollers/asm/coding.md

@@ -15,7 +15,7 @@ If using μVision, Right-click `Source Group 1` and select `Add New Item`. Selec
 
 If using Keil Studio, open `main.c` within the `Source Files` group.
 
-## The main Function
+## The main function
 
 Create the `main` C function. This function creates two character arrays, `a` and `b`, and calls two functions, `my_strcpy` and `my_capitalize`, that shall be implemented later.