[stable/telegraf] Bump telegraf version from 1.10 to 1.12 (#17843)

stable/telegraf/Chart.yaml

 apiVersion: v1
 name: telegraf
-version: 1.1.5
-appVersion: 1.10
+version: 1.1.6
+appVersion: 1.12
 deprecated: false
 description: Telegraf is an agent written in Go for collecting, processing, aggregating, and writing metrics.
 keywords:

stable/telegraf/values.yaml

@@ -6,7 +6,7 @@ replicaCount: 1
 
 image:
   repo: "telegraf"
-  tag: "1.10-alpine"
+  tag: "1.12-alpine"
   pullPolicy: IfNotPresent
 
 podAnnotations: {}