Update screenshot

Author: vbagirov

docs/adguard-for-android/features/protection/private-browser.md

@@ -11,7 +11,7 @@ This article is about AdGuard for Android, a multifunctional ad blocker that pro
 
 In v4.7, AdGuard for Android introduced an in-app private browser. You can access it from the main screen by tapping the *Private browser* button or from the *Protection* tab, where you can find some customization options.
 
-![Private browser](https://cdn.adtidy.org/content/release_notes/ad_blocker/android/v4.7/agpb_en.png)
+![Private browser *mobile](https://cdn.adtidy.org/content/release_notes/ad_blocker/android/v4.7/agpb_en.png)
 
 Here's what you can set up: