Update courses.yml

Author: mstreit

_data/courses.yml

@@ -5,13 +5,13 @@
   years: since 2020  
 
 - author: streit 
-  title: Visualization (formerly Visual Analytics)
+  title: "Visualization (formerly Visual Analytics)"
   institution: jku
   contribution: Lecture and lab
   years: since 2012
 
 - author: streit 
-  title: Advanced Interactive Visualization (formerly Information Visualization)
+  title: "Advanced Interactive Visualization (formerly Information Visualization)"
   institution: jku
   contribution: Lecture and lab
   years: since 2012
@@ -23,7 +23,7 @@
   years: 2023 - 2-25
 
 - author: streit 
-  title: Accompanying Courses for PhD, Master and Bachelor Students
+  title: "Accompanying Courses for PhD, Master and Bachelor Students"
   institution: jku
   contribution: Seminar
   years: since 2012