✏ Highlight branch names in PR template (#4573)

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,10 +1,10 @@
 <!--
-Thank you for your interest into contributing to OctoPrint, it's
+Thank you for your interest in contributing to OctoPrint, it's
 highly appreciated!
 
 Please make sure you have read the "guidelines for contributing" as
 linked just above this form, there's a section on Pull Requests in there
-as well that contains important information.
+as well which contains important information.
 
 As a summary, please make sure you have ticked all points on this
 checklist:
@@ -16,25 +16,25 @@ checklist:
     made sure your changes don't interfere with current development by
     talking it through with the maintainers, e.g. through a
     Brainstorming ticket
-  * [ ] Your PR targets OctoPrint's devel branch if it's a completely
-    new feature, or maintenance if it's a bug fix or improvement of
+  * [ ] Your PR targets OctoPrint's `devel` branch if it's a completely
+    new feature, or `maintenance` if it's a bug fix or improvement of
     existing functionality for the current stable version (no PRs
-    against master or anything else please)
+    against `master` or anything else please)
   * [ ] Your PR was opened from a custom branch on your repository
-    (no PRs from your version of master, maintenance or devel please),
-    e.g. dev/my_new_feature or fix/my_bugfix
+    (no PRs from your version of `master`, `maintenance`, or `devel`
+    please), e.g. `dev/my_new_feature` or `fix/my_bugfix`
   * [ ] Your PR only contains relevant changes: no unrelated files,
     no dead code, ideally only one commit - rebase and squash your PR
     if necessary!
   * [ ] Your changes follow the existing coding style
   * [ ] If your changes include style sheets: You have modified the
-    .less source files, not the .css files (those are generated with
-    lessc)
+    `.less` source files, not the `.css` files (those are generated
+    with `lessc`)
   * [ ] You have tested your changes (please state how!) - ideally you
     have added unit tests
   * [ ] You have run the existing unit tests against your changes and
     nothing broke
-  * [ ] You have added yourself to the AUTHORS.md file :)
+  * [ ] You have added yourself to the `AUTHORS.md` file :)
 
 <!--
 Describe your PR further using the template provided below. The more