Update podman-container.unit.5.md.in

ServiceName defaults to quadlet name.

Signed-off-by: Andreas <43118918+eulores@users.noreply.github.com>

Author: eulores

docs/source/markdown/podman-container.unit.5.md.in

@@ -339,7 +339,7 @@ Set the label process type for the container processes.
 
 ### `ServiceName=name`
 
-By default, Quadlet will name the systemd service unit by appending `-container` to the name of the Quadlet.
+By default, Quadlet will name the systemd service unit after the name of the Quadlet.
 Setting this key overrides this behavior by instructing Quadlet to use the provided name.
 
 Note, the name should not include the `.service` file extension