Do recursive copy to safely publish javadoc

.github/workflows/make-docs.yml

@@ -80,7 +80,7 @@ jobs:
       run: |
         git pull
         rm -r 1.0/ 2.0/
-        mv /tmp/smithy-docs/* .
+        cp -R /tmp/smithy-docs/* .
         git config --global user.name "smithy-automation"
         git config --global user.email "[email protected]"
         git add -A