fix: Fix reverse text style mapping of EuiDescriptionList

Author: grodriguez85

packages/core/addon/utils/css-mappings/eui-description-list.ts

@@ -13,7 +13,7 @@ export const alignMapping = {
 };
 
 export const textStyleMapping = {
-  center: `${baseClass}--reverse`,
+  reverse: `${baseClass}--reverse`,
   normal: ''
 };