Update Workflow Files

Author: PT400C

.github/workflows/build.yml

@@ -11,7 +11,10 @@ jobs:
       - name: Set up JDK 21
         uses: actions/setup-java@v5
         with:
-          java-version: '21'
+          java-version: |
+            8
+            16
+            21
           distribution: 'adopt'
           cache: gradle
       - name: Grant execute permission for gradlew

.github/workflows/publish.yml

@@ -22,7 +22,10 @@ jobs:
       - name: Set up JDK 21
         uses: actions/setup-java@v5
         with:
-          java-version: '21'
+          java-version: |
+            8
+            16
+            21
           distribution: 'adopt'
           cache: gradle
       - name: Grant execute permission for gradlew