Use python 3.12 everywhere

Also specify a python version in build-docs, where we weren't specifying
one.

Signed-off-by: Rodrigo Tobar <[email protected]>

.github/workflows/build-and-test.yaml

@@ -137,7 +137,7 @@ jobs:
       - name: Install Python
         uses: actions/setup-python@v5
         with:
-          python-version: "3.10"
+          python-version: "3.12"
 
       - name: Install Python dependencies
         run: pip install matplotlib h5py scipy
@@ -171,7 +171,7 @@ jobs:
       - name: Install Python
         uses: actions/setup-python@v5
         with:
-          python-version: "3.10"
+          python-version: "3.12"
 
       - name: Install Python dependencies
         run: pip install h5py

.github/workflows/build-docs.yml

@@ -10,6 +10,8 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-python@v5
+      with:
+        python-version: "3.12"
     - name: Install dependencies
       run: pip install -r doc/requirements.txt
     - name: Build documentation