Update to JDK 21 (#654)

Author: Foso

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,3 +1,3 @@
 ### :thinking: DOD Checklist
 
-- [ ] I did all relevant changes to the documentation and the [changelog](https://github.com/Foso/Ktorfit/blob/master/docs/CHANGELOG.md).
+- [] I did all relevant changes to the documentation and the [changelog](https://github.com/Foso/Ktorfit/blob/master/docs/CHANGELOG.md).

.github/workflows/build.yml

@@ -29,20 +29,20 @@ jobs:
       - name: Set up JDK
         uses: actions/setup-java@v4
         with:
-          distribution: zulu
-          java-version: 17
+          distribution: temurin
+          java-version: 21
       - uses: gradle/actions/setup-gradle@v4
       - name: API check
         run: ./gradlew ktLintCheck apiCheck
   build:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v4
-      - name: Set up JDK 11
+      - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
-          java-version: 17
-          distribution: 'zulu'
+          java-version: 21
+          distribution: 'temurin'
       - name: Cache Gradle and wrapper
         uses: actions/cache@v4
         with:

.github/workflows/publish-converters.yml

@@ -10,11 +10,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Install JDK 11
+      - name: Install JDK 21
         uses: actions/setup-java@v4
         with:
-          distribution: 'zulu'
-          java-version: 17
+          distribution: 'temurin'
+          java-version: 21
 
       - uses: gradle/gradle-build-action@v4
 

.github/workflows/publish.yml

@@ -10,11 +10,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Install JDK 11
+      - name: Install JDK 21
         uses: actions/setup-java@v4
         with:
-          distribution: 'zulu'
-          java-version: 17
+          distribution: 'temurin'
+          java-version: 21
 
       - uses: gradle/gradle-build-action@v3
 
@@ -31,11 +31,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Install JDK 11
+      - name: Install JDK 21
         uses: actions/setup-java@v4
         with:
-          distribution: 'zulu'
-          java-version: 17
+          distribution: 'temurin'
+          java-version: 21
 
       - uses: gradle/gradle-build-action@v3
 
@@ -52,11 +52,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Install JDK 11
+      - name: Install JDK 21
         uses: actions/setup-java@v4
         with:
-          distribution: 'zulu'
-          java-version: 17
+          distribution: 'temurin'
+          java-version: 21
 
       - uses: gradle/gradle-build-action@v3
 
@@ -73,11 +73,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Install JDK 11
+      - name: Install JDK 21
         uses: actions/setup-java@v4
         with:
-          distribution: 'zulu'
-          java-version: 17
+          distribution: 'temurin'
+          java-version: 21
 
       - uses: gradle/gradle-build-action@v3
 
@@ -94,11 +94,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Install JDK 11
+      - name: Install JDK 21
         uses: actions/setup-java@v4
         with:
-          distribution: 'zulu'
-          java-version: 17
+          distribution: 'temurin'
+          java-version: 21
 
       - uses: gradle/gradle-build-action@v3