guides, move incomplete example to corresponding option. #21349

[ci skip]

This example is dependent on the `:end_at` option and has been removed
from `4-2-stable` (d167b811)

guides/source/active_record_querying.md

@@ -341,8 +341,6 @@ User.find_each(begin_at: 2000, batch_size: 5000) do |user|
 end
 ```
 
-Another example would be if you wanted multiple workers handling the same processing queue. You could have each worker handle 10000 records by setting the appropriate `:begin_at` option on each worker.
-
 **`:end_at`**
 
 Similar to the `:begin_at` option, `:end_at` allows you to configure the last ID of the sequence whenever the highest ID is not the one you need.
@@ -356,6 +354,10 @@ User.find_each(begin_at: 2000, end_at: 10000, batch_size: 5000) do |user|
 end
 ```
 
+Another example would be if you wanted multiple workers handling the same
+processing queue. You could have each worker handle 10000 records by setting the
+appropriate `:begin_at` and `:end_at` options on each worker.
+
 #### `find_in_batches`
 
 The `find_in_batches` method is similar to `find_each`, since both retrieve batches of records. The difference is that `find_in_batches` yields _batches_ to the block as an array of models, instead of individually. The following example will yield to the supplied block an array of up to 1000 invoices at a time, with the final block containing any remaining invoices: