Update java instrumentation version

Author: jvoravong

helm-charts/splunk-otel-collector/values.yaml

@@ -1293,7 +1293,7 @@ instrumentation:
   # Auto-instrumentation Libraries (Start)
   java:
     repository: ghcr.io/signalfx/splunk-otel-java/splunk-otel-java
-    tag: v2.15.0
+    tag: v2.16.0
     # env:
     #   - name: JAVA_ENV_VAR
     #     value: java_value