Update descriptions and headings in PSA learning materials for clarity

Author: madeline-underwood

content/learning-paths/cross-platform/psa-tfm/_index.md

@@ -7,6 +7,8 @@ cascade:
 
 minutes_to_complete: 120
 
+description: Learn how to build and run the Arm Trusted Firmware Platform Security Architecture (PSA) software stack on Corstone-1000 using FVP simulation or MPS3 FPGA hardware.
+
 who_is_this_for: This an introductory topic is for software developers new to Platform Security Architecture (PSA) and Arm Trusted Firmware components
 
 learning_objectives: 

content/learning-paths/cross-platform/psa-tfm/sdm.md

@@ -35,7 +35,7 @@ This adds a new debug configuration, `MPS3_Corstone-1000_ADAC`.
 
 Click `Rebuild Database`, then `Apply and Close`.
 
-## Create Debug Connection
+## Create debug connection
 
 Using the `MPS3_Corstone-1000_ADAC` configuration, create a [debug connection](https://developer.arm.com/documentation/101469/latest/Debugging-code/Configuring-a-connection-to-a-bare-metal-hardware-target) to the `Cortex-A35` processor on the MPS3 development board.