Update README.md

Very minor styling fix

Author: danlo

README.md

@@ -232,7 +232,8 @@ class MyJob < ApplicationJob
   # ...
 ```
 - `key` is the only required parameter, and it can be a symbol, a string or a proc that receives the job arguments as parameters and will be used to identify the jobs that need to be limited together. If the proc returns an Active Record record, the key will be built from its class name and `id`.
-- `to` is `1` by default, and `duration` is set to `SolidQueue.default_concurrency_control_period` by default, which itself defaults to `3 minutes`, but that you can configure as well.
+- `to` is `1` by default.
+- `duration` is set to `SolidQueue.default_concurrency_control_period` by default, which itself defaults to `3 minutes`, but that you can configure as well.
 - `group` is used to control the concurrency of different job classes together. It defaults to the job class name.
 
 When a job includes these controls, we'll ensure that, at most, the number of jobs (indicated as `to`) that yield the same `key` will be performed concurrently, and this guarantee will last for `duration` for each job enqueued. Note that there's no guarantee about _the order of execution_, only about jobs being performed at the same time (overlapping).