DEV: Fix a flaky bookmarks test (#15129)

* DEV: Specify bookmarks order

It's better to order by id than to have a semi-random order. Fixes a flaky test:

```
 1) TopicView with a few sample posts #bookmarks gets the first post bookmark reminder at for the user
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     Failure/Error: expect(first[:post_id]).to eq(bookmark1.post_id)
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       expected: 1901
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            got: 1902
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       (compared using ==)
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     # ./spec/components/topic_view_spec.rb:420:in `block (4 levels) in <main>'
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     # ./spec/rails_helper.rb:284:in `block (2 levels) in <top (required)>'
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     # ./vendor/bundle/ruby/2.7.0/gems/webmock-3.14.0/lib/webmock/rspec.rb:37:in `block (2 levels) in <top (required)>'
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```

* Change test

* Revert "DEV: Specify bookmarks order"

This reverts commit 1f50026231.

spec/components/topic_view_spec.rb

@@ -416,7 +416,7 @@ describe TopicView do
       it "gets the first post bookmark reminder at for the user" do
         topic_view = TopicView.new(topic.id, user)
 
-        first, second = topic_view.bookmarks
+        first, second = topic_view.bookmarks.sort_by(&:id)
         expect(first[:post_id]).to eq(bookmark1.post_id)
         expect(first[:reminder_at]).to eq_time(bookmark1.reminder_at)
         expect(second[:post_id]).to eq(bookmark2.post_id)