fix: Use Cloud RAD in deprecation link in GoogleCredential class (#2606)

Author: diegomarquezp

google-api-client/src/main/java/com/google/api/client/googleapis/auth/oauth2/GoogleCredential.java

@@ -219,7 +219,7 @@ public static GoogleCredential getApplicationDefault(
    * @return the credential defined by the credentialStream.
    * @throws IOException if the credential cannot be created from the stream.
    * @deprecated This method is being deprecated because of a potential security risk.
-   *    Please use {@link <a href="https://javadoc.io/doc/com.google.auth/google-auth-library-oauth2-http/latest/com/google/auth/oauth2/GoogleCredentials.html">GoogleCredentials</a> instead.
+   *    Please use {@link <a href="https://cloud.google.com/java/docs/reference/google-auth-library/latest/com.google.auth.oauth2.GoogleCredentials">GoogleCredentials</a> instead.
    */
   @Beta
   @Deprecated
@@ -251,7 +251,7 @@ public static GoogleCredential fromStream(InputStream credentialStream) throws I
    * @return the credential defined by the credentialStream.
    * @throws IOException if the credential cannot be created from the stream.
    * @deprecated This method is being deprecated because of a potential security risk.
-   *    Please use {@link <a href="https://javadoc.io/doc/com.google.auth/google-auth-library-oauth2-http/latest/com/google/auth/oauth2/GoogleCredentials.html">GoogleCredentials</a> instead.
+   *    Please use {@link <a href="https://cloud.google.com/java/docs/reference/google-auth-library/latest/com.google.auth.oauth2.GoogleCredentials">GoogleCredentials</a> instead.
    */
   @Beta
   @Deprecated