build: try to fix dockerized builds #15

.github/workflows/gh-pages.yml

@@ -64,7 +64,7 @@ jobs:
           env
           
           echo ----------------------------------
-          find . -type f -name "*.md" -mindepth 2 -print0 | while read -d $'\0' doc
+          find . -type f -name "*.md" -mindepth 2 -print0 | sort -z | while read -d $'\0' doc
             do
               echo "Processing ${doc}..."
               output_dir=$(dirname "${doc}")