Added a missing assert for when the value is 70 (#45268)

curriculum/challenges/english/10-coding-interview-prep/algorithms/implement-binary-search.md

@@ -80,6 +80,11 @@ assert.deepEqual(binarySearch(_testArray, 11), [13, 5, 10, 11])
 assert.deepEqual(binarySearch(_testArray, 13), [13]);
 ```
 
+`binarySearch(testArray, 70)` should return `[13, 19, 22, 49, 70]`.
+
+```js
+assert.deepEqual(binarySearch(_testArray, 70), [13, 19, 22, 49, 70]);
+```
 
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