Add hourly climatology story (#97)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: dcherian

docs/source/user-stories.md

@@ -5,5 +5,6 @@
    :maxdepth: 1
 
    user-stories/climatology.ipynb
+   user-stories/climatology-hourly.ipynb
    user-stories/custom-aggregations.ipynb
 ```