pigz yanked from PyPI, get from conda

Author: ateucher

ci/environment.yml

@@ -111,14 +111,14 @@ dependencies:
   - shap
   - xgboost
   - openssh
+  - pigz
   # we could use more platforms but in the hub only linux-64 is relevant
   - pip
   - pip:
       - xq
       - jupyterlab-quarto
       - jupyter-desktop-server>=0.1.3
       - jupyterlab-open-url-parameter
-      - pigz
       - jupyter-sshd-proxy
       - jupyter-positron-server
 platforms: