Update README.md

Author: ameshkov

README.md

@@ -27,6 +27,6 @@ If you want to see what's in our nearest plans, or would like to submit a new bu
 
 Latest stable version: 2.1.359
 Latest beta version: 2.1.359 (release candidate №4)
-Latest alpha version: 2.5.2
+Latest alpha version: 2.5.3
 
 Adguard versions: https://github.com/AdguardTeam/AdguardForAndroid/releases