Fixes #4268: cli: give better hint what to put for --locale

src/vs/workbench/electron-main/cli.ts

@@ -36,8 +36,7 @@ ${ indent }--disable-extensions  Disable all installed extensions.
 ${ indent }-g, --goto            Open the file at path at the line and column (add
 ${ indent }                      :line[:column] to path).
 ${ indent }-h, --help            Print usage.
-${ indent }--locale=LOCALE       Use a specific locale, "pseudo" can be used to test
-${ indent }                      localization.
+${ indent }--locale=LOCALE       The locale to use (e.g. en-US or zh-TW).
 ${ indent }-n, --new-window      Force a new instance of Code.
 ${ indent }-r, --reuse-window    Force opening a file or folder in the last active
 ${ indent }                      window.