NPA-6074: Update python version in CI/CD

Author: ClarksonAdam

.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 3.13
               uses: actions/setup-python@v6
               with:
-                  python-version: 3.8
+                  python-version: 3.13
 
             - name: Upgrade python pip
               run: python -m pip install --upgrade pip

.github/workflows/openapi-validate.yml

@@ -52,7 +52,7 @@ jobs:
             - name: Set up Python
               uses: actions/setup-python@v6
               with:
-                  python-version: 3.9
+                  python-version: 3.13
 
             - name: Install Poetry
               shell: bash

.github/workflows/sandbox-checks.yaml

@@ -10,7 +10,7 @@ jobs:
         run: pipx install poetry
       - uses: actions/setup-python@v6
         with:
-          python-version: "3.8"
+          python-version: "3.13"
           cache: "poetry"
       - name: Install Sandbox dependencies
         run: make install