Update the workflow to test against latest EA build

Author: olyagpl

.github/workflows/java-simple-stream-benchmark.yml

@@ -20,7 +20,7 @@ jobs:
     timeout-minutes: 15
     strategy:
       matrix:
-        java-version: ['21', 'dev']
+        java-version: ['21', 'latest-ea']
     steps:
       - uses: actions/checkout@v4
       - uses: graalvm/setup-graalvm@v1