[misc] update issue template

.github/ISSUE_TEMPLATE.md

@@ -1,16 +1,27 @@
+Report checklist
+----------------
+
 (Place an x into each [ ] to confirm that you have read and performed the following)
 
 - [ ] I had a look at https://github.com/pbatard/rufus/wiki/FAQ to see if my issue/question has been answered there.
 - [ ] I performed a search in the issue tracker for similar issues, using keywords relevant to my problem.
-- [ ] I clicked on the 'Log' button in Rufus and I have copied it, into the line says <FULL LOG> below.
+- [ ] I clicked on the 'Log' button in Rufus and I have copied it, into the line that says `<FULL LOG>` below.
 - [ ] The log I am copying is the FULL log, starting with the line `Rufus version: x.y.z` - I have NOT removed any part of it.
 
-Issue description:
-------------------
+Additionally (if applicable):
+- [ ] I have run a bad blocks check, by clicking the "bad blocks" check box in Rufus, and confirmed that my USB is not defective
+- [ ] I have also tried one or more of the following:
+  - [ ] Using a different USB drive
+  - [ ] Plugging the USB into a different port
+  - [ ] Running Rufus on a different computer
+- [ ] If using an ISO image, I have clicked on the `#` button, at the bottom of Rufus, to compute the MD5, SHA1 and SHA256 checksums (which are therefore reported in the log I copied) and confirmed, by performing an internet search, that these values match the ones from the official image.
+
+Issue description
+-----------------
 <Describe your issue here>
 
-Log:
-----
+Log
+---
 ```
 <FULL LOG>
 ```