Fix formatting bug in ISSUE_TEMPLATE.md

1. There was a trailing asterisk in one of the headers, preventing the formatting from being applied.
2. There needs to be a blank line between the bold header and the code block in order for formatting to be applied to the header.

Signed-off-by: Paul Buonopane <[email protected]>

.github/ISSUE_TEMPLATE.md

@@ -49,7 +49,8 @@ Briefly describe the problem you are having in a few paragraphs.
 
 **Additional information you deem important (e.g. issue happens only occasionally):**
 
-**Output of `docker-compose --version`: ***
+**Output of `docker-compose --version`:**
+
 ```
 (paste your output here)
 ```