use release tag for downloading latest github releases...

forge-gui-android/src/forge/app/Main.java

@@ -639,6 +639,12 @@ public class Main extends ForgeAndroidApplication {
             return new GitLogs().getLatest(buildDateOriginal, maxDate);
         }
 
+        @Override
+        public String getReleaseTag() {
+            //android doesn't have release yet on github...
+            return "";
+        }
+
         @Override
         public boolean openFile(String filename) {
             try {