Update offline-widevine-for-android.md

Author: Juliako

articles/media-services/latest/offline-widevine-for-android.md

@@ -167,14 +167,12 @@ Depending on business logic of custom STS, different claims are issued in the JW
 
 ### Question
 
-For Widevine security levels, in Google’s [Widevine DRM Architecture Overview doc](https://storage.googleapis.com/wvdocs/Widevine_DRM_Architecture_Overview.pdf) documentation,
-it defines three different security levels. However, in [Azure Media Services documentation on Widevine license template](widevine-license-template-overview.md),
+For Widevine security levels, the Google’s "Widevine DRM Architecture Overview" doc defines three different security levels. However, in [Azure Media Services documentation on Widevine license template](widevine-license-template-overview.md),
 five different security levels are outlined. What is the relationship or mapping between the two different sets of security levels?
 
 ### Answer
 
-In Google’s [Widevine DRM Architecture Overview](https://storage.googleapis.com/wvdocs/Widevine_DRM_Architecture_Overview.pdf),
-it defines the following three security levels:
+The Google’s "Widevine DRM Architecture Review" doc, defines the following three security levels:
 
 1.  Security Level 1: All content processing, cryptography, and control are performed within the Trusted Execution Environment (TEE). In some implementation models, security processing may be performed in different chips.
 2.  Security Level 2: Performs cryptography (but not video processing) within the TEE: decrypted buffers are returned to the application domain and processed through separate video hardware or software. At level 2, however, cryptographic information is still processed only within the TEE.