Change using margin-left & margin-right properties

Replace `margin-left` and `margin-right` properties of the links and the icon
inside title container in language page with `margin-inline-start` and `margin-inline-end`
because when the `direction` property of these elements changed to "rtl",
`margin-inline-start` and `margin-inline-end` change margins directions of the
elements to suit the "rtl" direction.

pages/language/style.module.css

@@ -5,9 +5,9 @@
 }
 
 .titleContainer > div > a {
-  margin-left: 20px !important;
+  margin-inline-start: 20px !important;
 }
 
 .icon {
-  margin-right: 12px;
+  margin-inline-end: 12px;
 }