Add zizmor security scanner

.github/workflows/pr.yaml

@@ -7,12 +7,15 @@ on:
 
 jobs:
   lint:
+    permissions:
+      contents: read  # for actions/checkout to fetch code
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
         uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744
         with:
           fetch-depth: 0
+          persist-credentials: false
 
       - name: Set up Helm
         uses: azure/setup-helm@5119fcb9089d432beecbf79bb2c7915207344b78

.github/workflows/release.yaml

@@ -16,6 +16,7 @@ jobs:
         uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744
         with:
           fetch-depth: 0
+          persist-credentials: false
 
       - name: Configure Git
         run: |

.github/workflows/zizmor.yaml

@@ -0,0 +1,28 @@
+name: zizmor
+
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - '.github/**'
+  pull_request:
+    paths:
+      - '.github/**'
+
+permissions: {}
+
+jobs:
+  zizmor:
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+      contents: read
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Run zizmor
+        uses: zizmorcore/zizmor-action@b1d7e1fb5de872772f31590499237e7cce841e8e # v0.5.3