update linting doc (#105748)

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>

docs/developer/contributing/linting.asciidoc

@@ -47,17 +47,21 @@ file types.
 "eslint.validate": [
   "javascript",
   "javascriptreact",
-  { "language": "typescript", "autoFix": true },
-  { "language": "typescriptreact", "autoFix": true }
+  "typescript",
+  "typescriptreact",
 ]
 ----
 
+Although, starting with https://github.com/microsoft/vscode-eslint#version-204[ESLint v2.0.4], there is no need to use `eslint.validate` to parse typescript files as it works out of the box.
+
 `eslint` can automatically fix trivial lint errors when you save a
 file by adding this line in your setting.
 
 [source,json]
 ----
-  "eslint.autoFixOnSave": true,
+"editor.codeActionsOnSave": {
+   "source.fixAll.eslint": true
+}
 ----
 
 :warning: It is *not* recommended to use the
@@ -67,4 +71,4 @@ the multiple `.eslintrc.js` files across the project and some of them
 use the https://www.npmjs.com/package/prettier[NPM version of Prettier].
 Using the IDE extension might cause conflicts, applying the formatting
 to too many files that shouldn’t be prettier-ized and/or highlighting
-errors that are actually OK.
+errors that are actually OK.