Update PRIVACY_POLICY.md

Author: YangDai2003

PRIVACY_POLICY.md

@@ -1,7 +1,7 @@
 ## Privacy Policy of Open Note
 
 Open Note is an open-source Android app developed by Yang Dai.  
-The source code is available on GitHub under the Apache License (2.0 or later).
+The source code is available on GitHub under the GPL-3.0 license.
 
 ### Data Collection
 
@@ -13,10 +13,10 @@ The app requires the following permissions, as listed in the `AndroidManifest.xm
 
 https://github.com/YangDai2003/OpenNote-Compose/blob/4bc1cafa7368d81c539a09374e95d9859ab170a4/app/src/main/AndroidManifest.xml#L4-L7
 
-| Permission                         | Purpose                                                    |
-|------------------------------------|------------------------------------------------------------|
-| `android.permission.USE_BIOMETRIC` | Used for implementing the app's login functionality        |
-| `android.permission.INTERNET`      | Used to access the internet for loading images in markdown |
+| Permission                         | Purpose                                                                                                       |
+|------------------------------------|---------------------------------------------------------------------------------------------------------------|
+| `android.permission.USE_BIOMETRIC` | Enables biometric authentication to provide secure access to protected notes                                  |
+| `android.permission.INTERNET`      | Allows network connectivity for loading web content (images, videos, and other media) when rendering markdown |
 
 ### Dependencies