Documentation version handling (#36)

* docs: secure jupyter-book v1

* .github: secure ubuntu version to 24.04

* .github: upgrade Python to 3.12

Author: jjokella

.github/workflows/docs.yml

@@ -17,7 +17,7 @@ concurrency:
 
 jobs:
   deploy-docs:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     environment:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}
@@ -27,10 +27,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Set up Python 3.11
+      - name: Set up Python 3.12
         uses: actions/setup-python@v5
         with:
-          python-version: 3.11
+          python-version: 3.12
           cache: 'pip'
 
       - name: Install dependencies

docs/requirements.txt

@@ -1,4 +1,4 @@
-jupyter-book
+jupyter-book < 2
 matplotlib
 numpy
 ghp-import