Analyse workflows using zizmor

.github/workflows/docker_pygem.yml

@@ -40,6 +40,8 @@ jobs:
     steps:
       - name: 'Check out the repo'
         uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - name: 'Set up Docker buildx'
         uses: docker/setup-buildx-action@v3

.github/workflows/test_suite.yml

@@ -41,6 +41,8 @@ jobs:
       - name: 'Checkout the PyGEM repo'
         id: checkout
         uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - name: 'Reinstall PyGEM'
         run: pip install --break-system-packages -e .

.github/workflows/zizmor.yml

@@ -0,0 +1,33 @@
+name: "Workflows static analysis using zizmor"
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - master
+      - dev
+  pull_request:
+    paths:
+      - ".github/workflows/*"
+
+jobs:
+  zizmor-scan:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Install Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.x'
+
+      - name: Install zizmor
+        run: |
+          python3 -m pip install --upgrade pip
+          python3 -m pip install zizmor
+
+      - name: Run zizmor
+        run: zizmor .github/workflows/