CI: Use Java 21 instead of 20, change distro to Temurin (#477)

Author: snazy

.github/workflows/main.yml

@@ -26,7 +26,7 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        java-version: [11, 17, 20]
+        java-version: [11, 17, 21]
     steps:
       - uses: actions/checkout@v4
         with:
@@ -39,7 +39,7 @@ jobs:
         if: ${{ matrix.java-version == '11' }}
         uses: actions/setup-java@v3
         with:
-          distribution: 'zulu'
+          distribution: 'temurin'
           java-version: 8
       - name: Configure env with Java 8 home
         if: ${{ matrix.java-version == '11' }}
@@ -58,7 +58,7 @@ jobs:
       - name: Set up JDK ${{ matrix.java-version }}
         uses: actions/setup-java@v3
         with:
-          distribution: 'zulu'
+          distribution: 'temurin'
           java-version: ${{ matrix.java-version }}
 
       - name: Spotless Check

.github/workflows/release.yml

@@ -64,7 +64,7 @@ jobs:
       - name: Set up JDK 11
         uses: actions/setup-java@v3
         with:
-          distribution: 'zulu'
+          distribution: 'temurin'
           java-version: 11
           gpg-private-key: ${{ secrets.MAVEN_GPG_PRIVATE_KEY }}
           gpg-passphrase: MAVEN_GPG_PASSPHRASE