Update reference number of Figures (#71)

* Update reference of figures

Author: kar-rahul-aws

ch02.md

@@ -440,7 +440,7 @@ procedure to create a new project:
 | event\_groups.c                 | FreeRTOS/Source              |
 | stream\_buffer.c                | FreeRTOS/Source              |
 | All C and assembler files       | FreeRTOS/Source/portable/\[compiler\]/\[architecture\] |
-| *heap\_n.c*                     | *FreeRTOS/Source/portable/MemMang, where n is either 1, 2, 3, 4 or 5* |
+| heap\_n.c                       | FreeRTOS/Source/portable/MemMang, where n is either 1, 2, 3, 4 or 5 |
 
 *Table 1 FreeRTOS source files to include in the project*
 * * *

ch03.md

@@ -833,7 +833,7 @@ These functions will be explained in the appropriate chapters in this book.
 
 ### 3.4.2 Static Internal Kernel Memory
 
-When you enable the static memory allocator, the idle task and the timer task (if enabled) will use static memory supplied 
+When the static memory allocator is enabled, the idle task and the timer task (if enabled) will use static memory supplied 
 by user functions. These user functions are:
 
 - `vApplicationGetTimerTaskMemory`

ch05.md

@@ -631,7 +631,7 @@ It is common in FreeRTOS designs for a task to receive data from more
 than one source. The receiving task needs to know where the data came
 from to determine what to do with it. An easy design pattern to achieve
 that uses a single queue to transfer structures that contain both the
-data value and data source, as demonstrated in Figure 34.
+data value and data source, as demonstrated in Figure 5.4.
 
 <a name="fig5.4" title="Figure 5.4 An example scenario where structures are sent on a queue"></a>
 
@@ -640,7 +640,7 @@ data value and data source, as demonstrated in Figure 34.
 *Figure 5.4 An example scenario where structures are sent on a queue*
 * * *
 
-Referring to Figure 34:
+Referring to Figure 5.4:
 
 - The created queue holds structures of type `Data_t`. The structure
   allows both a data value and an enumerated type indicating what the