Adjust typo in PR template

Also slightly reword for better readability

Author: jnoordsij

.github/PULL_REQUEST_TEMPLATE.md

@@ -37,7 +37,7 @@ What types of changes does your code introduce? Put an `x` in all the boxes that
 - [ ] Bug fix (non-breaking change which fixes an issue)
 - [ ] New feature (non-breaking change which adds functionality)
 - [ ] Breaking change (fix or feature that would cause existing functionality to change)
-- [ ] Others (non of above)
+- [ ] Other (none of the above)
 
 ## Checklist