Change post view page title.

Change-Id: I01dc16df134a613f4c9d76e748e344f2e5837e97
diff --git a/src/main/java/eu/mulk/mulkcms2/benki/posts/PostResource.java b/src/main/java/eu/mulk/mulkcms2/benki/posts/PostResource.java
index f58140e..47e1594 100644
--- a/src/main/java/eu/mulk/mulkcms2/benki/posts/PostResource.java
+++ b/src/main/java/eu/mulk/mulkcms2/benki/posts/PostResource.java
@@ -212,7 +212,7 @@
 
     return postList
         .data("postDays", new PostPage<>(null, null, null, List.of(post)).days())
-        .data("pageTitle", pageTitle)
+        .data("pageTitle", String.format("Post #%d", id))
         .data("showBookmarkForm", false)
         .data("showLazychatForm", false)
         .data("hasPreviousPage", false)