changed snapshot workflow jdk to 21

Signed-off-by: Amit Galitzky <[email protected]>

.github/workflows/publish-snapshots.yml

@@ -23,7 +23,7 @@ jobs:
       - uses: actions/setup-java@v4
         with:
           distribution: temurin # Temurin is a distribution of adoptium
-          java-version: 17
+          java-version: 21
       - uses: actions/checkout@v4
       - uses: aws-actions/[email protected]
         with: