Updating docs with new struct members

Author: SenRamakri

docs/tutorials/optimize/memory/runtime_mem_trace.md

@@ -4,7 +4,7 @@ Running out of memory is a common problem with resource constrained systems such
 
 #### Using the memory tracer
 
-The memory tracer is not enabled by default. To enable it, you need to enable the **`memory-tracing-enabled`** setting in the Mbed OS platform configuration options. We recommend doing this by add it to your `mbed_app.json`:
+The memory tracer is not enabled by default. To enable it, you need to enable the **`memory-tracing-enabled`** setting in the Mbed OS platform configuration options. We recommend doing this by adding it to your `mbed_app.json`:
 
 ```
 {

docs/tutorials/optimize/memory/runtime_stats.md

@@ -38,6 +38,7 @@ Heap statistics provide exact information about the number of bytes dynamically
    | reserved_size     | Current number of bytes allocated for the heap.   |
    | alloc_cnt         | Current number of allocations.                    |
    | alloc_fail_cnt    | Number of failed allocations.                     |
+   | overhead_size     | Overhead added to heap for stats.                 |   
 
 
 #### Example heap statistics use cases