Change Java version from 21 to 17 in CI workflow

Author: ViralBShah

.github/workflows/CI.yml

@@ -45,7 +45,7 @@ jobs:
       - uses: actions/setup-java@v5
         with:
           distribution: 'zulu'
-          java-version: '21'
+          java-version: '17'
       - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ matrix.version }}