Update pipeline.yml

Author: jan-janssen

.github/workflows/pipeline.yml

@@ -68,7 +68,7 @@ jobs:
     - uses: actions/checkout@v4
     - uses: conda-incubator/setup-miniconda@v3
       with:
-        python-version: "3.14"
+        python-version: "3.13"
         miniforge-version: latest
         channels: conda-forge
         conda-remove-defaults: "true"