Pin python version in jupyter book build (#54)

Pin python version to 3.12 in when buildling jupyter book in ci to avoid need to build scipy from scratch with numpy < 2.1

Author: leifdenby

.github/workflows/deploy-docs-book.yml

@@ -23,7 +23,13 @@ jobs:
         cache: true
 
     - name: Install dependencies
+      # note we pin to using python 3.12 here because there aren't scipy wheels
+      # available for python3.13 unless we enforce use of numpy>=2.1 which
+      # seems quite aggressive for now. And without a scipy wheel we have to
+      # build from source, which would mean installing openblas which seems
+      # unnecessary
       run: |
+        pdm use --auto-install-min 3.12
         pdm install --prod
         pdm install --group docs
         pdm install --group visualisation

CHANGELOG.md

@@ -44,7 +44,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   [\#48](https://github.com/mllam/weather-model-graphs/pull/48), @leifdenby
 
 - Update github CI actions to fix failing build and deploy of jupyterbook
-  [\#49](https://github.com/mllam/weather-model-graphs/pull/49), @leifdenby
+  [\#49](https://github.com/mllam/weather-model-graphs/pull/49),
+  [\#54](https://github.com/mllam/weather-model-graphs/pull/54), @leifdenby
 
 ## [v0.2.0](https://github.com/mllam/weather-model-graphs/releases/tag/v0.2.0)