Update GitHub Actions workflow with permissions and concurrency (#420)

Author: jmertic

.github/dependabot.yml

@@ -0,0 +1,9 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: weekly
+    groups:
+      all:
+        dependency-type: "production"

.github/workflows/build.yml

@@ -5,11 +5,20 @@ on:
   schedule:
   - cron: "0 11 * * *"
 
+permissions: {}
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
     steps:
-      - uses: jmertic/lfx-landscape-tools@main
+      - uses: jmertic/lfx-landscape-tools@d34c5300ea55dae32df9fac122a924d2f85fbb87 # 20260415
         with:
           project_processing: skip
         env:

.github/workflows/dependabot-automerge.yml

@@ -0,0 +1,33 @@
+name: Auto-merge Dependabot PRs
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  dependabot:
+    runs-on: ubuntu-latest
+    if: github.actor == 'dependabot[bot]'
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        
+      - name: Approve PR
+        run: |
+          gh pr review --approve "${{ github.event.pull_request.number }}"
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Enable auto-merge
+        run: |
+          gh pr merge \
+            --squash \
+            --auto \
+            "${{ github.event.pull_request.number }}"
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/validate.yml

@@ -7,20 +7,23 @@ on:
       - main
       - master
 
+permissions: {}
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   validate-landscape:
     runs-on: ubuntu-latest
     name: "Validate landscape.yml file"
+    permissions:
+      contents: read
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-      - uses: cncf/landscape2-validate-action@7f299c46e9b03b4e8bc2896882734fb0b0756b37 # v2.0.0
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+      - uses: cncf/landscape2-validate-action@6381e8747c73412e638670807b402ef2b863e9f8 # v2.0.1
         with:
           target_kind: data
           target_path: ./landscape.yml
-      - uses: pascalgn/automerge-action@7961b8b5eec56cc088c140b56d864285eabd3f67 # v0.16.4
-        if: success()
-        env:
-          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
-          MERGE_LABELS: "automated-build"
-          MERGE_RETRY_SLEEP: 300000
-          MERGE_METHOD: "squash"