Corrected the wrong answer of Q46 in CSS quiz (Ebazhanov#2679)

top & bottom = 10px
right & left = 0px
we know that padding: top right bottom left;
then padding: 10px 0px 10px 0px is a valid way
padding: 10px 10px 0px 0px is the invalid one among these choices

css/css-quiz.md

@@ -568,10 +568,10 @@ Note: an alternative for Q7.
 
 #### Q46. What is not a valid way of declaring a padding value of 10 pixels on the top and bottom, and 0 pixels on the left and right?
 
-- [ ] padding: 10px 10px 0px 0px;
+- [x] padding: 10px 10px 0px 0px;
 - [ ] padding: 10px 0px;
 - [ ] padding: 10px 0;
-- [x] padding: 10px 0px 10px 0px;
+- [ ] padding: 10px 0px 10px 0px;
 
 #### Q47. Is there an error in this code? If so, find the best description of the problem