add missing descriptions to schema

declarations/WebpackOptions.d.ts

@@ -2962,12 +2962,14 @@ export interface LazyCompilationDefaultBackendOptions {
 	server?:
 		| (import("https").ServerOptions | import("http").ServerOptions)
 		| (() => import("net").Server);
-	[k: string]: any;
 }
 /**
  * Options for compiling entrypoints and import()s only when they are accessed.
  */
 export interface LazyCompilationOptions {
+	/**
+	 * Specifies the backend that should be used for handling client keep alive.
+	 */
 	backend?:
 		| (
 				| ((

schemas/WebpackOptions.json

@@ -1618,6 +1618,7 @@
     "LazyCompilationDefaultBackendOptions": {
       "description": "Options for the default backend.",
       "type": "object",
+      "additionalProperties": false,
       "properties": {
         "client": {
           "description": "A custom client.",
@@ -1682,6 +1683,7 @@
       "additionalProperties": false,
       "properties": {
         "backend": {
+          "description": "Specifies the backend that should be used for handling client keep alive.",
           "anyOf": [
             {
               "description": "A custom backend.",

types.d.ts

@@ -5805,8 +5805,6 @@ declare interface KnownStatsProfile {
  * Options for the default backend.
  */
 declare interface LazyCompilationDefaultBackendOptions {
-	[index: string]: any;
-
 	/**
 	 * A custom client.
 	 */
@@ -5832,6 +5830,9 @@ declare interface LazyCompilationDefaultBackendOptions {
  * Options for compiling entrypoints and import()s only when they are accessed.
  */
 declare interface LazyCompilationOptions {
+	/**
+	 * Specifies the backend that should be used for handling client keep alive.
+	 */
 	backend?:
 		| ((
 				compiler: Compiler,