Update ISSUE_TEMPLATE.md
It matches the official golang repo style now.
-- Version : **6.2.0**
+Please answer these questions before submitting your issue. Thanks!
-- Operating System:
+- [x] I have read the [GopherBOOk](http://gopherbook.iris-go.com), [Examples](https://github.com/iris-contrib/examples), [Contributing File](https://github.com/kataras/iris/blob/v6/.github/CONTRIBUTING.md) and **I'm sure that this issue is not posted** before.
-- [x] I have read the [book](https://docs.iris-go.com), [examples](https://github.com/iris-contrib/examples), [contributing file](https://github.com/kataras/iris/blob/master/.github/CONTRIBUTING.md) and **I'm sure that this issue is not posted** & answered before.
---------------
+### What version of Go are you using (`go version`)?
+
+
+### What operating system and processor architecture are you using (`go env`)?
+
+
+### What version of Iris are you using?
+
+
+### What did you do?
+
+If possible, provide a recipe for reproducing the error.
+A complete runnable program is good.
+
+
+### What did you expect to see?
+
+
+### What did you see instead?
