found mpg.csv in the corresponding sub-directory (keeping git clean to ensure it is regenerated)

.gitlab-ci.yml

@@ -17,8 +17,7 @@ pages:
     - quarto render
     - |
       # manage mpg.csv file by hand because it is strangely missing
-      # cp mpg.csv public/session2/mpg.csv
-      ls -R .
+      cp session2/mpg.csv public/session2/mpg.csv
   interruptible: true
   artifacts:
     paths: