Update nodejs instrumentation version

Author: jvoravong

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

@@ -1299,7 +1299,7 @@ instrumentation:
     #     value: java_value
   nodejs:
     repository: ghcr.io/signalfx/splunk-otel-js/splunk-otel-js
-    tag: v2.15.0
+    tag: v3.1.2
     # env:
     #   - name: NODEJS_ENV_VAR
     #     value: nodejs_value