set the python version to python 3.10 in the conda env

jobscript/base_config.sh

@@ -71,7 +71,7 @@ VENV_NAME="walberla_venv"
 if { conda env list | grep "$VENV_NAME"; } >/dev/null 2>&1; then
     echo "Found $VENV_NAME"
 else
-    conda create -n "$VENV_NAME" -y
+    conda create -n "$VENV_NAME" python=3.10 -y
 fi
 conda activate "$VENV_NAME"