Fix deprecated conda configuration warnings in CI workflow

Replace deprecated auto-activate-base with auto-activate and fix
channel name from 'default' to 'defaults' to resolve GitHub Actions
warnings.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: DocGarbanzo

.github/workflows/python-package-conda.yml

@@ -25,8 +25,8 @@ jobs:
         with:
           python-version: 3.11
           activate-environment: donkey
-          auto-activate-base: false
-          channels: default, conda-forge, pytorch
+          auto-activate: false
+          channels: defaults, conda-forge, pytorch
           channel-priority: true
       - name: Conda info and list
         run: |