Prefixed qty to stable_locales in --target-langs description

Author: adamlui

translate-messages/docs/README.md

@@ -42,7 +42,7 @@ Options can be set by using command-line arguments:
 | Option                 | Description                                                                                               | Example
 | ---------------------- | --------------------------------------------------------------------------------------------------------- | ------------------------------
 | `-d`, `--locales-dir`  | Name of the folder containing locale files (default: `_locales`)                                          | `--locales-dir=_messages`
-| `-t`, `--target-langs` | Comma-separated list of languages to translate to (default: all [`stable_locales`][stable-locales])       | `--target-langs=es,fr`
+| `-t`, `--target-langs` | Comma-separated list of languages to translate to (default: all 100+ [`stable_locales`][stable-locales])  | `--target-langs=es,fr`
 | `-k`, `--keys`         | Comma-separated list of keys to translate (default: all found src keys missing in target files)           | `--keys=app_DESC,err_NOT_FOUND`
 | `--exclude-langs`      | Comma-separated list of languages to exclude                                                              | `--exclude-langs=es,zh`
 | `--exclude-keys`       | Comma-separated list of keys to ignore                                                                    | `--exclude-keys=app_NAME,author`