ci: upgrade java to 21

Author: deblockt

.github/workflows/publish.yml

@@ -14,10 +14,10 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
-      - name: Set up JDK 11
+      - name: Set up JDK 21
         uses: actions/setup-java@v3
         with:
-          java-version: '11'
+          java-version: '21'
           distribution: 'temurin'
           server-id: github
           settings-path: ${{ github.workspace }}

.github/workflows/test.yml

@@ -13,10 +13,10 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
-      - name: Set up JDK 11
+      - name: Set up JDK 21
         uses: actions/setup-java@v3
         with:
-          java-version: '11'
+          java-version: '21'
           distribution: 'temurin'
       - name: Setup gradle
         uses: gradle/gradle-build-action@67421db6bd0bf253fb4bd25b31ebb98943c375e1