update python version for emulator tests

Author: rahul2393

.github/workflows/integration-tests-against-emulator-with-regular-session.yaml

@@ -21,7 +21,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.12
       - name: Install nox
         run: python -m pip install nox
       - name: Run system tests

.github/workflows/integration-tests-against-emulator.yaml

@@ -21,7 +21,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.12
       - name: Install nox
         run: python -m pip install nox
       - name: Run system tests