[skip ci] Change app share url to github

app/src/main/res/values/strings.xml

@@ -94,7 +94,7 @@
         \u3000\u3000 This is an open source reading software newly developed by Kotlin, welcome to join us.
     </string>
     <string name="app_share_description">
-        Legado (YueDu 3.0) download link：\n https://play.google.com/store/apps/details?id=io.legado.play.release
+        Legado (YueDu 3.0) download link：\n https://github.com/gedoor/legado/releases
     </string>
     <string name="version_name">Version %s</string>
     <string name="pt_background_verification">Background-verification</string>