Replace term "sample" with "example" for warning references in range [C6401, C6999]

Author: Rageking8

docs/code-quality/c6500.md

@@ -35,7 +35,7 @@ using namespace vc_attributes;
 void f( [Pre( Deref=2, Access=Read )] char buffer[] );
 ```
 
-To correct this warning, specify the correct level of dereference, as shown in the following sample code:
+To correct this warning, specify the correct level of dereference, as shown in the following example code:
 
 ```cpp
 // C

docs/code-quality/c6506.md

@@ -27,7 +27,7 @@ void f(_Out_ char c)
 }
 ```
 
-To correct this warning, use a pointer or an array type, as shown in the following sample code:
+To correct this warning, use a pointer or an array type, as shown in the following example code:
 
 ```cpp
 #include <sal.h>

docs/code-quality/c6514.md

@@ -31,7 +31,7 @@ using namespace vc_attributes;
 void f( [Pre(Deref=1, ValidElementsConst=8)] char(*matrix) [6] );
 ```
 
-To correct this warning, make sure the size of specified in ValidElementsConst is less than or equal to the size of the array, as shown in the following sample code:
+To correct this warning, make sure the size of specified in ValidElementsConst is less than or equal to the size of the array, as shown in the following example code:
 
 ```cpp
 // C

docs/code-quality/c6522.md

@@ -34,7 +34,7 @@ using namespace vc_attributes;
 void f ([Pre(ValidBytes="c")] char *pc, double c);
 ```
 
-To correct this warning, use `size_t` for the `ValidBytesParam` parameter data type, as shown in the following sample code:
+To correct this warning, use `size_t` for the `ValidBytesParam` parameter data type, as shown in the following example code:
 
 ```cpp
 // C