Add Jump Search image (TheAlgorithms#552)

* Add Jump Search image

* Update README.md

Author: TobiDueces

README.md

@@ -177,6 +177,7 @@ In interpolation-sequential search, interpolation is used to find an item near t
 ###### Source: [Wikipedia](https://en.wikipedia.org/wiki/Interpolation_search)
 
 ## Jump Search
+![alt text][JumpSearch-image]
 In computer science, a jump search or block search refers to a search algorithm for ordered lists. It works by first checking all items Lkm, where {\displaystyle k\in \mathbb {N} } k\in \mathbb {N}  and m is the block size, until an item is found that is larger than the search key. To find the exact position of the search key in the list a linear search is performed on the sublist L[(k-1)m, km].
 
 The optimal value of m is √n, where n is the length of the list L. Because both steps of the algorithm look at, at most, √n items the algorithm runs in O(√n) time. This is better than a linear search, but worse than a binary search. The advantage over the latter is that a jump search only needs to jump backwards once, while a binary can jump backwards up to log n times. This can be important if a jumping backwards takes significantly more time than jumping forward.
@@ -293,4 +294,6 @@ where {\displaystyle \oplus } \oplus  denotes the exclusive disjunction (XOR) op
 
 [ROT13-image]: https://upload.wikimedia.org/wikipedia/commons/3/33/ROT13_table_with_example.svg "ROT13"
 
+[JumpSearch-image]: https://i1.wp.com/theoryofprogramming.com/wp-content/uploads/2016/11/jump-search-1.jpg "Jump Search"
+
 [QuickSelect-image]: https://upload.wikimedia.org/wikipedia/commons/0/04/Selecting_quickselect_frames.gif "Quick Select"