feat: add optional hotkey for post-processing request

Author: sammcj

src/components/settings/PostProcessingHotkey.tsx

@@ -303,9 +303,8 @@ export const PostProcessingHotkey: React.FC<PostProcessingHotkeyProps> = ({
       </div>
       {!hasBinding && (
         <p className="text-xs text-mid-gray/70 mt-2">
-          Click to set a dedicated hotkey for post-processing. Leave unset to
-          use the standard transcribe hotkey with the global post-processing
-          setting.
+          Use a dedicated hotkey for post-processing. If configured
+          post-processing will only occur when this hotkey is used.
         </p>
       )}
     </SettingContainer>