fixing inconsistency in logical padding/margin example

Author: chrisdavidmills

learn/writing-modes/logical-mbp.html

@@ -27,7 +27,7 @@
 
       .logical {
         margin-block-start: 20px;
-        padding-inline-start: 2em;
+        padding-inline-end: 2em;
         padding-block-start: 2px;
         border-block-start: 5px solid pink;
         border-inline-end: 10px dotted rebeccapurple;
@@ -73,7 +73,7 @@ <h2>Logical Properties</h2>
 
 .logical {
   margin-block-start: 20px;
-  padding-inline-start: 2em;
+  padding-inline-end: 2em;
   padding-block-start: 2px;
   border-block-start: 5px solid pink;
   border-inline-end: 10px dotted rebeccapurple;