RF: Install python 3.9, rather than the host default (which was 3.8 on my

macbook, which was ok. but is 2.7 on the new deploy runner)

rules/fsl-ci-job-template.yml

@@ -72,7 +72,7 @@
     # dir, and install fsl-ci-rules into it
     - if [ "$DOCKER" == "0" ]; then
         CONDADIR=$(dirname $(which conda))
-        conda create -y -p ${FSL_CI_CONFIG_DIR}/env -c conda-forge python=$(python -V | cut -d ' ' -f 2);
+        conda create -y -p ${FSL_CI_CONFIG_DIR}/env -c conda-forge python=3.9;
         source $CONDADIR/bin/activate ${FSL_CI_CONFIG_DIR}/env;
       fi
     - if [ "$CI_PROJECT_PATH" == "fsl/fsl-ci-rules" ]; then