Fix typos in telegraf (#3635)

stable/telegraf/Chart.yaml

 name: telegraf
-version: 0.3.1
+version: 0.3.2
 deprecated: true
 description: Telegraf is an agent written in Go for collecting, processing, aggregating, and writing metrics.
 keywords:

stable/telegraf/values.yaml

@@ -6,7 +6,7 @@ image:
   tag: "1.5-alpine"
   pullPolicy: IfNotPresent
 ## Configure the telegraf daemonset here.
-## Resource limits and outputs can be set seperately
+## Resource limits and outputs can be set separately
 daemonset:
   enabled: true
   ## Configure resource requests and limits
@@ -129,7 +129,7 @@ daemonset:
         bearer_token: "/var/run/secrets/kubernetes.io/serviceaccount/token"
         insecure_skip_verify: true
 ## Configure the telegraf single instance here.
-## Resource limits and outputs can be set seperately
+## Resource limits and outputs can be set separately
 single:
   enabled: true
   ## Configure resource requests and limits