Update opentelemetry-java-instrumentation version to v2.16.0 (#6902)

Co-authored-by: Fabrizio Ferri Benedetti <fabri.ferribenedetti@elastic.co>

content/en/docs/languages/java/_index.md

@@ -6,7 +6,7 @@ description: >-
 aliases: [/java, /java/metrics, /java/tracing]
 cascade:
   vers:
-    instrumentation: 2.15.0
+    instrumentation: 2.16.0
     otel: 1.50.0
     contrib: 1.46.0
     semconv: 1.32.0

content/en/docs/zero-code/java/_index.md

@@ -6,7 +6,7 @@ aliases:
   - /docs/languages/java/automatic_instrumentation
 cascade:
   vers:
-    instrumentation: 2.15.0
+    instrumentation: 2.16.0
     otel: 1.50.0
 ---
 

static/refcache.json

@@ -17571,6 +17571,10 @@
     "StatusCode": 206,
     "LastSeen": "2025-04-11T08:28:47.812984827-07:00"
   },
+  "https://repo1.maven.org/maven2/io/opentelemetry/instrumentation/opentelemetry-instrumentation-bom-alpha/2.16.0-alpha/opentelemetry-instrumentation-bom-alpha-2.16.0-alpha.pom": {
+    "StatusCode": 206,
+    "LastSeen": "2025-05-16T08:01:09.322908+02:00"
+  },
   "https://repo1.maven.org/maven2/io/opentelemetry/instrumentation/opentelemetry-instrumentation-bom-alpha/2.7.0-alpha/opentelemetry-instrumentation-bom-alpha-2.7.0-alpha.pom": {
     "StatusCode": 206,
     "LastSeen": "2024-10-23T20:20:08.34491-05:00"
@@ -17611,6 +17615,10 @@
     "StatusCode": 206,
     "LastSeen": "2025-04-11T08:28:47.731244373-07:00"
   },
+  "https://repo1.maven.org/maven2/io/opentelemetry/instrumentation/opentelemetry-instrumentation-bom/2.16.0/opentelemetry-instrumentation-bom-2.16.0.pom": {
+    "StatusCode": 206,
+    "LastSeen": "2025-05-16T08:01:07.050126+02:00"
+  },
   "https://repo1.maven.org/maven2/io/opentelemetry/instrumentation/opentelemetry-instrumentation-bom/2.7.0/opentelemetry-instrumentation-bom-2.7.0.pom": {
     "StatusCode": 206,
     "LastSeen": "2024-10-23T20:20:07.402964-05:00"