shorten the title

Author: jeongyoonlee

_config.yml

@@ -6,8 +6,8 @@
 # https://learn-the-web.algonquindesign.ca/topics/markdown-yaml-cheat-sheet/#yaml
 # https://learnxinyminutes.com/docs/yaml/
 
-title: EconML/CausalML KDD 2021 Lecture-Style Tutorial
-description: EconML/CausalML KDD 2021 Lecture-Style Tutorial
+title: EconML/CausalML KDD 2021 Tutorial
+description: EconML/CausalML KDD 2021 Tutorial
 github_username: causal-machine-learning
 # you can comment the below line out if your repo name is not different than your baseurl
 github_repo: "kdd2021-tutorial"