fix typo

Author: obestwalter

.github/PULL_REQUEST_TEMPLATE.md

@@ -3,7 +3,7 @@ Thanks for contributing a PR!
 Here's a quick checklist of what we'd like you to think off:
 
 - [ ] Make sure to include one or more tests for your change;
-- [ ] if an enhacement PR please create docs and at best an example
+- [ ] if an enhancement PR please create docs and at best an example
 - [ ] Add yourself to `CONTRIBUTORS`;
 - [ ] make a descriptive Pull Request text (it will be used for changelog)