docs: add edge cases to JumpSearch documentation

Author: prashantpiyush1111

src/main/java/com/thealgorithms/searches/JumpSearch.java

@@ -34,7 +34,14 @@
  *
  * <p>
  * <b>Space Complexity:</b> O(1) - only uses a constant amount of extra space
- *
+ * 
+ * <p>
+ * <b>Edge Cases:</b>
+ * <ul>
+ *   <li>Empty array → returns -1</li>
+ *   <li>Element not present → returns -1</li>
+ *   <li>Single element array</li>
+ * </ul>
  * <p>
  * <b>Note:</b> Jump Search requires a sorted array. For unsorted arrays, use Linear Search.
  * Compared to Linear Search (O(n)), Jump Search is faster for large arrays.