UI: Clarify encoder preset usage

For the simple output section, clarifying that higher == less CPU is
pretty important.

obs/data/locale/en-US.ini

@@ -226,7 +226,7 @@ Basic.Settings.Output.Reconnect="Automatically Reconnect"
 Basic.Settings.Output.RetryDelay="Retry Delay (seconds)"
 Basic.Settings.Output.MaxRetries="Maximum Retries"
 Basic.Settings.Output.Advanced="Enable Advanced Encoder Settings"
-Basic.Settings.Output.EncoderPreset="Encoder Preset"
+Basic.Settings.Output.EncoderPreset="Encoder Preset (higher = less CPU)"
 Basic.Settings.Output.CustomEncoderSettings="Custom Encoder Settings"
 Basic.Settings.Output.UseCBR="Use Constant Bitrate"