Fix eratic test for POST /api/pleroma/admin/reports/:id/notes

It retrieved two ReportNotes and then checked one of them. But the order isn't guaranteed, while the test tested on the content of the first ReportNote.

I made the test on the content more generic

test/pleroma/web/admin_api/controllers/report_controller_test.exs

@@ -355,7 +355,6 @@ test "it creates report note", %{admin_id: admin_id, report_id: report_id} do
              } = note
     end
 
-    @tag :erratic
     test "it returns reports with notes", %{conn: conn, admin: admin} do
       conn = get(conn, "/api/pleroma/admin/reports")
 
@@ -364,7 +363,8 @@ test "it returns reports with notes", %{conn: conn, admin: admin} do
       [note, _] = notes
 
       assert note["user"]["nickname"] == admin.nickname
-      assert note["content"] == "this is disgusting!"
+      # We use '=~' because the order of the notes isn't guaranteed
+      assert note["content"] =~ "this is disgusting"
       assert note["created_at"]
       assert response["total"] == 1
     end