Update java version for workflows to 21

Author: Lauriichan

.github/workflows/default.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ 17 ]
+        java: [ 21 ]
     name: Java ${{ matrix.java }} compile
     steps:
       - uses: actions/checkout@master
@@ -29,11 +29,11 @@ jobs:
         key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
         restore-keys: |
           ${{ runner.os }}-maven-
-    - name: Set up JDK 17
+    - name: Set up JDK 21
       uses: actions/setup-java@v2
       with:
         distribution: 'adopt'
-        java-version: 17
+        java-version: 21
     - name: Build and test project
       run: mvn clean verify
     - name: Upload Maven build artifact

.github/workflows/pullrequest.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ 17 ]
+        java: [ 21 ]
     name: Java ${{ matrix.java }} compile
     steps:
       - uses: actions/checkout@master
@@ -29,10 +29,10 @@ jobs:
         key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
         restore-keys: |
           ${{ runner.os }}-maven-
-    - name: Set up JDK 17
+    - name: Set up JDK 21
       uses: actions/setup-java@v2
       with:
         distribution: 'adopt'
-        java-version: 17
+        java-version: 21
     - name: Build and test project
       run: mvn clean verify