[S32/Containers] fixed typo in negative .rotate

Author: Util

S32-setting-library/Containers.pod

@@ -653,7 +653,7 @@ rotated by the specified amount.  A positive rotation of 1 is defined as:
 
     @array.push(@array.shift);
 
-A negative shift of 1 is defined as:
+A negative rotation of 1 is defined as:
 
     @array.unshift(@array.pop);