Update SudokuSolver.java

Submission Result: Wrong Answer L 91

Input:	["..9748...","7........",".2.1.9...","..7...24.",".64.1.59.",".98...3..","...8.3.2.","........6","...2759.."]
Output:	["139748652","745326189","826159437","..7...24.",".64.1.59.",".98...3..","...8.3.2.","........6","...2759.."]
Expected:	["519748632","783652419","426139875","357986241","264317598","198524367","975863124","832491756","641275983"]