Try using pre-build magic

Removed redundant build steps for HTML documentation.

Author: MicahGale

.readthedocs.yaml

@@ -14,11 +14,9 @@ build:
       - git fetch --unshallow || true
       - git config remote.origin.fetch '+refs/heads/*:refs/remotes/origin/*' || true
       - git fetch --all --tags || true
-    build:
-      html:
-        - cd doc && make html 
-        - mkdir -p $READTHEDOCS_OUTPUT/html/
-        - cp -r doc/build/html/* $READTHEDOCS_OUTPUT/html/
+    pre_build:
+      # ensure that all builds have necessary jupyterlite files
+      - cd doc && make html 
 
 # Build documentation in the "docs/" directory with Sphinx
 sphinx: