docs: fix wrong position of a description (#270)

Author: DCsunset

Diff for: docs/modules/icon.md

@@ -31,11 +31,11 @@ pwa: {
 **sizes**
 - Default: `[64, 120, 144, 152, 192, 384, 512]`
 
+Array of sizes to be generated (Square).
+
 **targetDir**
 - Default: `icons`
 
-Array of sizes to be generated (Square).
-
 **accessibleIcons**
 - Default: true