Upgrade Python version (#479)

Author: jonathan-r-thorpe

.github/workflows/build-test.yml

@@ -78,9 +78,9 @@ jobs:
         echo "RUNNER_WORKSPACE=${{ runner.workspace }}" >> $GITHUB_ENV
 
     - name: install python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v6
       with:
-        python-version: 3.8
+        python-version: 3.12
 
     - name: install pip
       run: |

.github/workflows/src/build-test.yml

@@ -78,9 +78,9 @@ jobs:
         echo "RUNNER_WORKSPACE=${{ runner.workspace }}" >> $GITHUB_ENV
 
     - name: install python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v6
       with:
-        python-version: 3.8
+        python-version: 3.12
 
     - name: install pip
       run: |