Add https://github.com/ferrous-systems/rust-training/pull/365 diagram to Booting 32-bit Arm deck

[jonathanpallant]

These are nice updates for the Cortex-M deck. We should do something similar for the 32-bit Arm deck.

[robamu]

The memory layout actually tends to be similar. The most important difference is probably that the vector table looks different. Maybe adapt the diagram with the vector table?