add key points; fix slides url

_episodes/01-introduction.md

@@ -6,8 +6,12 @@ objectives:
 - "Overview of CMS trigger system"
 keypoints:
 - "You will be familiar with basic concepts and terminology related to triggering, so that you can apply them in your work (e.g. turn-on, prescale, matching...)"
+- "You will be able to describe the main features of the CMS trigger system"
+- "You will have an overview of the CMS trigger menu, allowing you to identify suitable triggers for your physics analysis"
+- "You will be familiar with the analysis tools needed to access trigger-related information in CMS datasets"
+- "You will know how to perform trigger efficiency measurements"
 ---
-We will learn the overview of CMS trigger system, both L1 and HLT, with [slides](https://indico.cern.ch/event/1443889/).
+We will learn the overview of CMS trigger system, both L1 and HLT, with [slides](https://indico.cern.ch/event/1443871/).