build: update GH actions

Author: jknack

.github/workflows/build-matrix.yml

@@ -8,19 +8,22 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java_version: [17,21]
-        os: [ubuntu-latest, windows-latest, macOS-latest]
+        jre: [17]
+        os: [ ubuntu-latest, windows-latest, macOS-latest ]
+        include:
+          - jre: 21
+            os: ubuntu-latest
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Mustache Specs
         run: |
           git submodule update --init --recursive
       - name: Set up JDK ${{ matrix.java_version }}
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
-          java-version: ${{ matrix.java_version }}
+          java-version: ${{ matrix.jre }}
           distribution: 'temurin'
       - name: Install
         run: mvn clean install -DskipTests --batch-mode --no-transfer-progress

.github/workflows/maven-central.yml

@@ -10,9 +10,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up JDK 17
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: 17
           distribution: 'temurin'