doc: update ttsCachePath help

Author: jersou

README.md

@@ -263,7 +263,7 @@ Options:
      --port                         port of GUI server                                               [default: 5555]
      --skip-read-tts-cache          disable the TTS cache usage                                     [default: false]
      --skip-write-tts-cache         disable the TTS cache write                                     [default: false]
-     --tts-cache-path               path to the TTS cache    [default: "<Studio-Pack-Generator dir>/.spg-TTS-cache"]
+     --tts-cache-path               path to the TTS cache    [default: "<home dir>/.Studio-Pack-Generator/TTS-cache"]
      --custom-script                custom script to be used for custom image... handling                   [string]
      --metadata                     Metadata of the pack                                                    [object]
      --i-18-n                       Custom i18n                                                             [object]

studio_pack_generator.ts

@@ -175,7 +175,7 @@ export class StudioPackGenerator {
   skipWriteTtsCache = false;
 
   @help("path to the TTS cache")
-  @defaultHelp("<Studio-Pack-Generator dir>/.spg-TTS-cache")
+  @defaultHelp("<home dir>/.Studio-Pack-Generator/TTS-cache")
   ttsCachePath: string = `${homedir}/.Studio-Pack-Generator/TTS-cache`;
 
   @type("string")