Fix bug

Author: jondy

.github/workflows/build-docs-actions.yml

@@ -29,7 +29,7 @@ jobs:
             pip install linuxdoc
       - name: Prepare _site
         run: |
-            mkdir -p _site/pyarmor/docs
+            mkdir -p _site/pyarmor/{docs,learn}
             cp index.html _site/
             cp pyarmor/index.html _site/pyarmor/
             cp -a pyarmor/assets/ _site/pyarmor/assets