licenced --> licensed

licence (double c's) is only used when the word is a noun, not a verb

@slachiewicz

.github/pull_request_template.md

@@ -22,7 +22,7 @@ To make clear that you license your contribution under
 the [Apache License Version 2.0, January 2004](http://www.apache.org/licenses/LICENSE-2.0)
 you have to acknowledge this by using the following check-box.
 
- - [ ] I hereby declare this contribution to be licenced under the [Apache License Version 2.0, January 2004](http://www.apache.org/licenses/LICENSE-2.0)
+ - [ ] I hereby declare this contribution to be licensed under the [Apache License Version 2.0, January 2004](http://www.apache.org/licenses/LICENSE-2.0)
 
  - [ ] In any other case, please file an [Apache Individual Contributor License Agreement](https://www.apache.org/licenses/icla.pdf).