workflows: update to Java 24

Signed-off-by: Benjamin Gilbert <bgilbert@cs.cmu.edu>

Author: bgilbert

.github/workflows/java.yaml

@@ -19,7 +19,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, ubuntu-24.04-arm, macos-latest, windows-latest]
-        java: [22, 23]
+        java: [22, 24]
         include:
           - os: ubuntu-latest
             java: 22