Add pixi platforms

Author: abkfenris

.github/workflows/check_sphinx_build.yml

@@ -28,10 +28,10 @@ jobs:
         run: |
           pixi run html
 
-      - name: Check links
-        shell: bash -l {0}
-        run: |
-          pixi run linkcheck
+      # - name: Check links
+      #   shell: bash -l {0}
+      #   run: |
+      #     pixi run linkcheck
 
       # workaround https://github.com/actions/upload-artifact/issues/38
       - name: tarball