CI: update GitHub Actions and add zizmor workflow scan

.github/workflows/maven.yml

@@ -9,18 +9,25 @@ on:
   pull_request:
     branches: [ master, develop ]
 
+permissions: {}
+
 jobs:
   build:
-
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      # Required for setup-java Maven cache (restore/save); omitted token defaults no longer include this.
+      actions: write
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      with:
+        persist-credentials: false
     - name: Set up JDK 11
-      uses: actions/setup-java@v2
+      uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
       with:
         java-version: '11'
-        distribution: 'adopt'
+        distribution: 'temurin'
         cache: maven
     - name: Build with Maven
       run: mvn -B package --file pom.xml

.github/workflows/zizmor.yml

@@ -0,0 +1,31 @@
+# Static analysis for GitHub Actions workflow security and configuration issues.
+# See https://docs.zizmor.sh/
+
+name: zizmor
+
+on:
+  push:
+    branches: [ develop ]
+  pull_request:
+    branches: [ master, develop ]
+
+permissions: {}
+
+jobs:
+  zizmor:
+    name: Run zizmor
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Run zizmor
+        uses: zizmorcore/zizmor-action@71321a20a9ded102f6e9ce5718a2fcec2c4f70d8 # v0.5.2
+        with:
+          # Console + annotations work without GitHub Advanced Security; enable SARIF upload instead if the repo has code scanning.
+          advanced-security: false
+          annotations: true