Move note about null terminator to a more appropriate location.

It was confusing to have the note about strings sandwiched between a note about the example code and that code, which is not about strings.

Author: per1234

Language/Variables/Utilities/sizeof.adoc

@@ -66,7 +66,7 @@ void loop() {
 
 [float]
 === Notes and Warnings
-Note that `sizeof` returns the total number of bytes. So for larger variable types such as ints, the for loop would look something like this. Note also that a properly formatted string ends with the NULL symbol, which has ASCII value 0.
+Note that `sizeof` returns the total number of bytes. So for larger variable types such as ints, the for loop would look something like this. 
 
 [source,arduino]
 ----
@@ -75,5 +75,7 @@ for (i = 0; i < (sizeof(myInts)/sizeof(myInts[0])); i++) {
 }
 ----
 
+Note that a properly formatted string ends with the NULL symbol, which has ASCII value 0.
+
 --
 // HOW TO USE SECTION ENDS