Do not specify python version in build docs workflow

Author: finsberg

.github/workflows/build_docs.yml

@@ -40,7 +40,6 @@ jobs:
 
       - uses: conda-incubator/setup-miniconda@v3
         with:
-          python-version: 3.10
           auto-update-conda: false
           channels: conda-forge,defaults
           channel-priority: strict