Eliminate last backticks

.github/pull_request_template.md

@@ -1,4 +1,4 @@
-<!-- HOW TO USE: Below each `#### Heading` section below, enter information relevant to your pull request.
+<!-- HOW TO USE: Under each "#### Heading" below, enter information relevant to your pull request.
 Leave the headings unless they don't apply to your PR, and remove the comment blocks (surrounded with <!–– and ––>) when you are done.
 
 NOTE: Please grant permission for repository maintainers to edit your PR.  It is EXTREMELY common for PRs to be held up due to trivial changes being requested and the author being unavailable to make them.