[PULL_REQUEST_TEMPLATE.md] Add checkable Improvement options PR's purpose

diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
index 3a168b7b192147595fdfc06273138501ba9faad2..89e8a3188151705b25f3a237abe977dcb760be41 100644 (file)
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -16,6 +16,7 @@ ### In order to be accepted and merged into youtube-dl each piece of code must b
 
 ### What is the purpose of your *pull request*?
 - [ ] Bug fix
+- [ ] Improvement
 - [ ] New extractor
 - [ ] New feature