github: fix typo in ISSUE_TEMPLATE
MODIFY
.github/ISSUE_TEMPLATE
.github/ISSUE_TEMPLATE
<!--
-Please make sure your issue title matchs the Go convention; a summary
+Please make sure your issue title matches the Go convention; a summary
of the problem, prefixed by the primary affected package.
If the issue is a question about usage or similar, please ask at the

github: fix typo in ISSUE_TEMPLATE