docs(config): Clarify stats option sort and default

Author: jasonblanchard

src/content/configuration/stats.md

@@ -40,6 +40,7 @@ stats: {
   // Add asset Information
   assets: true,
   // Sort assets by a field
+  // You can reverse the sort with `!field`.
   assetsSort: "field",
   // Add information about cached (not built) modules
   cached: true,
@@ -54,6 +55,7 @@ stats: {
   // Add the origins of chunks and chunk merging info
   chunkOrigins: true,
   // Sort the chunks by a field
+  // You can reverse the sort with `!field`. Default is `id`.
   chunksSort: "field",
   // Context directory for request shortening
   context: "../src/",
@@ -87,6 +89,7 @@ stats: {
   // Add built modules information
   modules: true,
   // Sort the modules by a field
+  // You can reverse the sort with `!field`. Default is `id`.
   modulesSort: "field",
   // Show dependencies and origin of warnings/errors (since webpack 2.5.0)
   moduleTrace: true,