Update GitHub bug issue template (influxdata#6554)

.github/ISSUE_TEMPLATE/Bug_report.md

@@ -3,26 +3,39 @@ name: Bug report
 about: Create a report to help us improve
 
 ---
+<!--
+Please redirect any questions about Telegraf usage to the InfluxData Community
+site: https://community.influxdata.com
+
+Check the documentation for the related plugin including the troubleshooting
+section if available.
+-->
 
 ### Relevant telegraf.conf:
-<!-- [Place config between triple backticks '```'] -->
+<!-- Place config in the toml code section. -->
 ```toml
 
 ```
 
 ### System info:
 
-<!-- [Include Telegraf version, operating system name, and other relevant details] -->
+<!-- Include Telegraf version, operating system, and other relevant details -->
 
 ### Steps to reproduce:
 
+<!-- Describe the steps to reproduce the bug. -->
+
 1. ...
 2. ...
 
 ### Expected behavior:
 
+<!-- Describe what you expected to happen when you performed the above steps. -->
+
 ### Actual behavior:
 
+<!-- Describe what actually happened when you performed the above steps. -->
+
 ### Additional info:
 
-<!-- [Include gist of relevant config, logs, etc.] -->
+<!-- Include gist of relevant config, logs, etc. -->