update on readme (trekhleb#235)

I make sure readers get the full understanding of the documentation

Author: SlyCreator

src/algorithms/sorting/bubble-sort/README.md

@@ -3,7 +3,7 @@
 Bubble sort, sometimes referred to as sinking sort, is a 
 simple sorting algorithm that repeatedly steps through 
 the list to be sorted, compares each pair of adjacent 
-items and swaps them if they are in the wrong order. 
+items and swaps them if they are in the wrong order(ascending or descending arrangement). 
 The pass through the list is repeated until no swaps 
 are needed, which indicates that the list is sorted.