Updated Working for Android (markdown)

Working-for-Android.md

@@ -23,7 +23,7 @@ sdkmanager --sdk_root= --update
 sdkmanager --sdk_root=<your_path_sdk> --list
 sdkmanager --sdk_root=<your_path_sdk> --install build-tools;29.0.3
 sdkmanager --sdk_root=<your_path_sdk> --install platform-tools
-sdkmanager --sdk_root=<your_path_sdk> --install platforms;android-29
+sdkmanager --sdk_root=<your_path_sdk> --install platforms;android-28
 sdkmanager --sdk_root=<your_path_sdk> --install extras;google;usb_driver
 ```
 With those commands you're installing all required tools. It includes: `tools`, `build-tools`, `platform-tools`, `platforms\android-28` api level and also `extras\google\usb_driver` (that you need to install to connect to your device).