Update _bookdown.yml

Update the `book_filename` and `repo` within `_bookdown.yml`

Author: kweav

_bookdown.yml

@@ -1,6 +1,6 @@
-book_filename: "Course_Name"
+book_filename: "AI for Efficient Programming"
 chapter_name: "Chapter "
-repo: https://github.com/fhdsl/AI_for_software
+repo: https://github.com/fhdsl/AI_for_Efficient_Programming
 rmd_files: ["index.Rmd",
             "01-intro.Rmd",
             "02-ethics.Rmd",