Update understand-metrics.md (#3789)

Update the Understand Metrics page for Upsun to include RAM for services.

Co-authored-by: flovntp <flovntp@gmail.com>
Co-authored-by: AnouckColson <113913013+AnouckColson@users.noreply.github.com>

sites/friday/src/increase-observability/metrics/understand-metrics.md

@@ -10,19 +10,18 @@ description: Understand how to read metrics for {{< vendor/name >}} environments
 * Service containers: zero or more [service containers](../../add-services/_index.md)
 * Worker containers: zero or more [worker instances](../../create-apps/app-reference.md#workers).
 
-Infrastructure metrics report CPU, RAM, and disk space for app and worker containers
-and CPU and disk space for service containers.
+Infrastructure metrics report CPU, RAM, and disk space for app, service, and worker containers.
 These metrics are available for all of your environments.
 
 App containers are shown first, with the app name and an image corresponding to the app type.
-Service containers follow next with the same pattern and worker containers are shown last.
+Service containers follow next with the same pattern, and worker containers are shown last.
 
-You can collapse the graphs by clicking the 3-dot menu on the right hand side, then **Hide resources**.
+You can collapse the graphs by clicking the 3-dot menu on the right-hand side, then **Hide resources**.
 The graphs switch to an overview of the average resource utilization for the selected container.
 
 ![How service container metrics look when minimized](/images/metrics/service-container-minimized.png "0.65")
 
-The same menu provides a convenient **Configure resource** CTA allowing you to swiftly
+The same menu provides a convenient **Configure resource** CTA, allowing you to swiftly
 adjust resources allocation for that container based on the observability metrics.
 
 ## Example of how to read metrics
@@ -53,19 +52,18 @@ The persistent disk has been configured in the [project resources](/manage-resou
 
 ### Service containers
 
-Unlike [app containers](#app-container), metrics graphs service containers don't show RAM allocation and usage.
-So you don't see all of your project's allocated RAM in the graphs.
+Metrics graphs for the service containers show CPU, RAM, and disk allocation and usage.
 
 #### MySQL
 
-Metrics graphs for the MySQL service container show CPU and disk allocation and usage.
+Metrics graphs for the MySQL service container show CPU, RAM, and disk allocation and usage.
 The persistent disk has been configured in the [project resources](/manage-resources.md).
 
 ![All of the metrics for the MySQL container](/images/metrics/mysql-container.png)
 
 #### Redis
 
-Metrics graphs for the Redis service container show CPU and disk allocation and usage.
+Metrics graphs for the Redis service container show CPU, RAM, disk allocation and usage.
 No persistent disk has been configured for Redis.
 
 ![All of the metrics for the Redis container](/images/metrics/redis-container.png)