Bug fix

https://github.com/2dust/v2rayNG/issues/3193

V2rayNG/app/src/main/res/layout/activity_about.xml

@@ -1,8 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
-    android:layout_height="match_parent"
+    android:layout_height="match_parent">
+
+    <LinearLayout xmlns:app="http://schemas.android.com/apk/res-auto"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
         android:orientation="vertical">
 
         <LinearLayout
@@ -223,4 +226,5 @@
 
     </LinearLayout>
 
+</ScrollView>