ci: Run zizmor for GHA security analysis

This runs the zizmor security lint [1] on our GH Actions.
The initial workflow uses [2] as a base.

[1] https://docs.zizmor.sh/
[2] https://docs.zizmor.sh/usage/#use-in-github-actions

Signed-off-by: Aurélien Bombo <abombo@microsoft.com>

.github/workflows/zizmor.yaml

@@ -0,0 +1,30 @@
+name: GHA security analysis
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    paths: [".github/workflows/**"]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  zizmor:
+    runs-on: ubuntu-22.04
+    permissions:
+      contents: read
+      security-events: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          fetch-depth: 0
+          persist-credentials: false
+
+      - name: Run zizmor
+        uses: zizmorcore/zizmor-action@f52a838cfabf134edcbaa7c8b3677dde20045018 # v0.1.1