Update SIG Instrumentation charter/scope

Adds tracing and removes references to the deprecated project Heapster,
replacing it with klog.

Author: ehashman

sig-instrumentation/README.md

@@ -8,7 +8,7 @@ To understand how this file is generated, see https://git.k8s.io/community/gener
 --->
 # Instrumentation Special Interest Group
 
-Covers best practices for cluster observability through metrics, logging, and events across all Kubernetes components and development of relevant components such as Heapster and kube-state-metrics. Coordinates metric requirements of different SIGs for other components through finding common APIs.
+Covers best practices for cluster observability through metrics, logging, events, and traces across all Kubernetes components and development of relevant components such as klog and kube-state-metrics. Coordinates metric requirements of different SIGs for other components through finding common APIs.
 
 The [charter](charter.md) defines the scope and governance of the Instrumentation Special Interest Group.
 

sig-instrumentation/charter.md

@@ -5,9 +5,9 @@ the Roles and Organization Management outlined in [sig-governance].
 
 ## Scope
 
-Owns best practices for cluster observability through metrics and logging
-across all Kubernetes components and development of components required for all
-Kubernetes clusters (eg. heapster, metrics-server).
+Owns best practices for cluster observability through metrics, logging, events,
+and traces across all Kubernetes components and development of components
+required for all Kubernetes clusters (eg. klog, kube-state-metrics).
 
 ### In scope
 

sigs.yaml

@@ -1459,9 +1459,9 @@ sigs:
 - dir: sig-instrumentation
   name: Instrumentation
   mission_statement: >
-    Covers best practices for cluster observability through metrics, logging, and
-    events across all Kubernetes components and development of relevant components
-    such as Heapster and kube-state-metrics. Coordinates metric requirements of different
+    Covers best practices for cluster observability through metrics, logging, events,
+    and traces across all Kubernetes components and development of relevant components
+    such as klog and kube-state-metrics. Coordinates metric requirements of different
     SIGs for other components through finding common APIs.
 
   charter_link: charter.md