Update docs/configuring-playbook-jitsi.md: create a list for descriptions about each tweak for tuning Jitsi

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

docs/configuring-playbook-jitsi.md

@@ -142,13 +142,12 @@ jitsi_web_config_resolution_width_ideal_and_max: 480
 jitsi_web_config_resolution_height_ideal_and_max: 240
 ```
 
-You may want to **suspend unused video layers** until they are requested again, to save up resources on both server and clients. Read more on this feature [here](https://jitsi.org/blog/new-off-stage-layer-suppression-feature/)
+These configurations:
 
-You may wish to **disable audio levels** to avoid excessive refresh of the client-side page and decrease the CPU consumption involved.
-
-You may want to **limit the number of video feeds forwarded to each client**, to save up resources on both server and clients. As clients’ bandwidth and CPU may not bear the load, use this setting to avoid lag and crashes. This feature is found by default in other webconference applications such as Office 365 Teams (limit is set to 4). Read how it works [here](https://github.com/jitsi/jitsi-videobridge/blob/master/doc/last-n.md) and performance evaluation on this [study](https://jitsi.org/wp-content/uploads/2016/12/nossdav2015lastn.pdf).
-
-You may want to **limit the maximum video resolution**, to save up resources on both server and clients.
+- **suspend unused video layers** until they are requested again, to save up resources on both server and clients. Read more on this feature [here](https://jitsi.org/blog/new-off-stage-layer-suppression-feature/).
+- **disable audio levels** to avoid excessive refresh of the client-side page and decrease the CPU consumption involved
+- **limit the number of video feeds forwarded to each client**, to save up resources on both server and clients. As clients’ bandwidth and CPU may not bear the load, use this setting to avoid lag and crashes. This feature is available by default on other webconference applications such as Office 365 Teams (the number is limited to 4). Read how it works [here](https://github.com/jitsi/jitsi-videobridge/blob/master/doc/last-n.md) and performance evaluation on this [study](https://jitsi.org/wp-content/uploads/2016/12/nossdav2015lastn.pdf).
+- **limit the maximum video resolution**, to save up resources on both server and clients
 
 ## Specify a Max number of participants on a Jitsi conference (optional)