android: my insertion stole downloadTarget's doc comment

Anchoring the new function on `fun downloadTarget` put it between that function
and its own KDoc — so downloadTarget lost its doc and onUnmeteredNetwork gained a
second one describing something else entirely. ktlint caught both halves.

Anchor on a declaration and you land inside its documentation. Swept the rest of
the tree for the same shape; nothing else.

android/app/src/main/java/com/fabledsword/thoughtsync/AppUpdate.kt

@@ -63,7 +63,6 @@ object AppUpdate {
             .setData(Uri.fromParts("package", context.packageName, null))
             .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
 
-    /** Where a download goes: app-private, so no storage permission is involved. */
     /**
      * Whether this is a network to spend fifty-odd megabytes on without being asked.
      *
@@ -80,6 +79,7 @@ object AppUpdate {
         return !manager.isActiveNetworkMetered
     }
 
+    /** Where a download goes: app-private, so no storage permission is involved. */
     fun downloadTarget(context: Context): File = File(context.cacheDir, "update.apk")
 
     /**