Update CONTRIBUTING.md

`type *var;` is better than `type* var;` due to the case of `type* var1, var2;` where `var1` is `type*` but `var2` is `type`, thus causing confusion.

CONTRIBUTING.md

@@ -31,7 +31,7 @@ namespace Example {
  
 // Declare globals at the top
 int g_foo = 0;
-char* g_some_pointer; // Notice the position of the *
+char *g_some_pointer; // Notice the position of the *
  
 enum SomeEnum {
     COLOR_RED,