[ci] add joblib to install

Author: JohannesBuchner

.github/workflows/test.yml

@@ -54,7 +54,7 @@ jobs:
 
       - name: Install python dependencies
         run: |
-          micromamba create -y -n ciao --override-channels -c https://cxc.cfa.harvard.edu/conda/ciao -c conda-forge ciao sherpa ds9 ciao-contrib caldb_main astropy "matplotlib>=3.5" ultranest "coverage<7.0.0" coveralls==3.3.1 scipy h5py astropy requests cython tqdm coverage toml &&
+          micromamba create -y -n ciao --override-channels -c https://cxc.cfa.harvard.edu/conda/ciao -c conda-forge ciao sherpa ds9 ciao-contrib caldb_main astropy "matplotlib>=3.5" ultranest "coverage<7.0.0" coveralls==3.3.1 scipy h5py astropy requests cython tqdm coverage toml joblib &&
           # micromamba env create -y -n ciao -f .github/workflows/ciao-conda-env.yml && 
           micromamba activate ciao &&
           echo "--- Environment dump start ---" &&