Update Python version in CI workflow to 3.12 (#153)

Co-authored-by: igba.ujege <igba.ujege@bjss.com>

Author: igba1980

.github/workflows/continuous-integration.yml

@@ -12,10 +12,10 @@ jobs:
         with:
           fetch-depth: 0  # This causes all history to be fetched, which is required for calculate-version to function	
 
-      - name: Install Python 3.8
+      - name: Install Python 3.12
         uses: actions/setup-python@v1
         with:
-          python-version: 3.8
+          python-version: 3.12
 
       - name: Upgrade python pip
         run: python -m pip install --upgrade pip