docs: fix list formatting in container-selection (#1380)

docs/container-selection.md

@@ -58,6 +58,7 @@ If instead you want to [only include containers with the enable label](https://c
 If you wish to create a monitoring scope, you will need to [run multiple instances and set a scope for each of them](https://containrrr.github.io/watchtower/running-multiple-instances).
 
 Watchtower filters running containers by testing them against each configured criteria. A container is monitored if all criteria are met. For example:
+
 -   If a container's name is on the monitoring name list (not empty `--name` argument) but it is not enabled (_centurylinklabs.watchtower.enable=false_), it won't be monitored;
 -   If a container's name is not on the monitoring name list (not empty `--name` argument), even if it is enabled (_centurylinklabs.watchtower.enable=true_ and `--label-enable` flag is set), it won't be monitored;