Remove Android code name from documentation (#339)

_i18n/en/documentation/general/external-storage.md

@@ -4,4 +4,4 @@ You can set AntennaPod to download episodes to your sd card instead of the inter
 
 It might be possible that your SD card does not show up in the `Choose Data Folder` dialog. For your SD card to show up, Android must recognize the card as external storage. Either the card is not mounted correctly or your smartphone manufacturer configured the hardware incorrectly.
 
-If you are running Android 6+ (Marshmallow or newer), you can try formatting the SD card as internal storage. Else, there is nothing we can do to fix this.
+If you are running Android 6 or newer, you can try formatting the SD card as internal storage. Else, there is nothing we can do to fix this.