fix appendices

_bookdown.yml

@@ -3,7 +3,4 @@ delete_merged_file: true
 rmd_files: ["index.Rmd","00-preface.Rmd", "01-intro.Rmd","02-methods.Rmd", "03-results-01.Rmd", "04-results-02.Rmd","05-discussion.Rmd", "appendix.Rmd","20-appendix-a.Rmd","21-appendix-b.Rmd", "99-references.Rmd"]
 language:
   ui:
-    chapter_name: "Chapter "
-    
-
-# "20-appendix-a.Rmd","21-appendix-b.Rmd",
\ No newline at end of file
+    chapter_name: "Chapter "
\ No newline at end of file