Style updates for pgbouncer page

Light updates for tone and style.

doc/administration/monitoring/prometheus/pgbouncer_exporter.md

@@ -6,29 +6,30 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 
 # PgBouncer exporter
 
->**Note:**
-Available since [Omnibus GitLab 11.0](https://gitlab.com/gitlab-org/omnibus-gitlab/-/merge_requests/2493).
-For installations from source you'll have to install and configure it yourself.
+> Introduced in [Omnibus GitLab 11.0](https://gitlab.com/gitlab-org/omnibus-gitlab/-/merge_requests/2493).
+
+The [PgBouncer exporter](https://github.com/prometheus-community/pgbouncer_exporter) enables
+you to measure various [PgBouncer](https://www.pgbouncer.org/) metrics.
 
-The [PgBouncer exporter](https://github.com/prometheus-community/pgbouncer_exporter) allows you to measure various PgBouncer metrics.
+NOTE: **Note:**
+For installations from source you'll have to install and configure it yourself.
 
 To enable the PgBouncer exporter:
 
-1. [Enable Prometheus](index.md#configuring-prometheus)
-1. Edit `/etc/gitlab/gitlab.rb`
-1. Add or find and uncomment the following line, making sure it's set to `true`:
+1. [Enable Prometheus](index.md#configuring-prometheus).
+1. Edit `/etc/gitlab/gitlab.rb`.
+1. Add (or find and uncomment) the following line, making sure it's set to `true`:
 
    ```ruby
    pgbouncer_exporter['enable'] = true
    ```
 
-1. Save the file and [reconfigure GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure) for the changes to
-   take effect.
+1. Save the file and [reconfigure GitLab](../../restart_gitlab.md#omnibus-gitlab-reconfigure)
+   for the changes to take effect.
 
-Prometheus will now automatically begin collecting performance data from
-the PgBouncer exporter exposed under `localhost:9188`.
+Prometheus will now begin collecting performance data from the PgBouncer exporter
+exposed at `localhost:9188`.
 
-The PgBouncer exporter will also be enabled by default if the [`pgbouncer_role`](https://docs.gitlab.com/omnibus/roles/#postgres-roles)
+The PgBouncer exporter will also be enabled by default if the
+[`pgbouncer_role`](https://docs.gitlab.com/omnibus/roles/#postgresql-roles)
 role is enabled.
-
-[← Back to the main Prometheus page](index.md)