minor fixes

Author: austintdaigle

_quarto.yml

@@ -19,9 +19,11 @@ book:
       - icon: github
         href: https://github.com/How-to-Learn-to-Code
         aria-label: GitHub
+    sidebar:
+      search: true
+      border: true
+      style: "floating"
   title: "How to Learn to Code – Python for Data Science"
-  sidebar:
-    style: floating
   chapters:                   # notebooks (ipynb) live inside lesson folders
     - index.qmd
     - Lesson_0_Introduction/Lesson_0_Student_Version.ipynb