Refresh the request profiling page

The request profiling page glossed over a few steps in the process
of profiling a request. Clean up the page to meet GitLab style,
and fix some of the gaps.

doc/administration/monitoring/performance/request_profiling.md

@@ -6,18 +6,34 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 
 # Request Profiling
 
-## Procedure
+To profile a request:
 
-1. Grab the profiling token from **Monitoring > Requests Profiles** admin page
-  (highlighted in a blue in the image below).
-  ![Profile token](img/request_profiling_token.png)
-1. Pass the header `X-Profile-Token: <token>` and `X-Profile-Mode: <mode>`(where `<mode>` can be `execution` or `memory`) to the request you want to profile. You can use:
-    - Browser extensions. For example, [ModHeader](https://chrome.google.com/webstore/detail/modheader/idgpnmonknjnojddfkpgkljpfnnfcklj) Chrome extension.
-    - `curl`. For example, `curl --header 'X-Profile-Token: <token>' --header 'X-Profile-Mode: <mode>' https://gitlab.example.com/group/project`.
-1. Once request is finished (which will take a little longer than usual), you can
-  view the profiling output from **Monitoring > Requests Profiles** admin page.
-  ![Profiling output](img/request_profile_result.png)
+1. Sign in to GitLab as a user with Administrator or Maintainer [permissions](../../../user/permissions.md).
+1. In the navigation bar, click **{admin}** **Admin area**.
+1. Navigate to **{monitor}** **Monitoring > Requests Profiles**.
+1. In the **Requests Profiles** section, copy the token.
+1. Pass the headers `X-Profile-Token: <token>` and `X-Profile-Mode: <mode>`(where
+   `<mode>` can be `execution` or `memory`) to the request you want to profile. When
+   passing headers, you can use:
 
-## Cleaning up
+   - Browser extensions such as the
+     [ModHeader](https://chrome.google.com/webstore/detail/modheader/idgpnmonknjnojddfkpgkljpfnnfcklj)
+     Chrome extension.
+   - `curl`. For example:
 
-Profiling output will be cleared out every day via a Sidekiq worker.
+     ```shell
+     curl --header 'X-Profile-Token: <token>' --header 'X-Profile-Mode: <mode>' "https://gitlab.example.com/group/project"
+     ```
+
+     NOTE: **Note:**
+     Profiled requests can take longer than usual.
+
+After the request completes, you can view the profiling output from the
+**{monitor}** **Monitoring > Requests Profiles** administration page:
+
+![Profiling output](img/request_profile_result.png)
+
+## Cleaning up profiled requests
+
+The output from profiled requests is cleared out once each day through a
+Sidekiq worker.