github: update issue template (bnb-chain#3328)

Author: zzzckck

.github/ISSUE_TEMPLATE/bug.md

@@ -1,25 +1,26 @@
 ---
 name: Report a bug
-about: Something with go-ethereum is not working as expected
+about: Something with BSC geth client is not working as expected
 title: ''
 labels: 'type:bug'
 assignees: ''
 ---
 
 #### System information
-
 Geth version: `geth version`
 OS & Version: Windows/Linux/OSX
 Commit hash : (if `develop`)
+Arguments:
 
-#### Expected behaviour
-
-
-#### Actual behaviour
-
+#### Description
+- Steps to reproduce the behaviour
+...
 
-#### Steps to reproduce the behaviour
+- Expected behaviour
+...
 
+- Actual behaviour
+...
 
 #### Backtrace
 

.github/ISSUE_TEMPLATE/question.md

@@ -6,4 +6,5 @@ labels: 'type:docs'
 assignees: ''
 ---
 
-This should only be used in very rare cases e.g. if you are not 100% sure if something is a bug or asking a question that leads to improving the documentation. For general questions please use [discord](https://discord.gg/nthXNEv) or the Ethereum stack exchange at https://ethereum.stackexchange.com.
+This should only be used in very rare cases e.g. if you are not 100% sure if something is a bug or asking a question that leads to improving the documentation.
+For general questions please use [discord](https://discord.com/invite/bnbchain).