fix execution issue template

.github/ISSUE_TEMPLATE/execution_bug_report.md

@@ -2,6 +2,6 @@
 name: Execution bug report
 about: You have an issue to execute xmr-stak.
 
- ---
+---
 
-**Most execution issues are caused by driver problems. Please use the [xmr-stak sub-reddit](https://www.reddit.com/r/XmrStak/) to ask for help instead of opening an issue here.**
\ No newline at end of file
+**Most execution issues are caused by driver problems. Please use the [xmr-stak sub-reddit](https://www.reddit.com/r/XmrStak/) to ask for help instead of opening an issue here.**